Mercury Outboard Forum

This is the best Mercury Outboard Forum on the internet, it's yours! If you own a Mercury Outboard.   Are you looking for good advice about your Mercury outboard engine problems and issues. All you need to know about your outboard engine issues and good advice from your fellow boaters.

From outboard engine and electrical and electronics systems to engine and alarm issues, tilt and trim issues, this is the place to find information.

Mercury Outboard Forum

So where do you start? There is a lot to know. I get asked regularly about what is the problem, and more importantly and how to fix a problem. I am a boat owner and that’s why I have published a dozen books to tell you all that you need to know about how to take care of your boats and systems.

My name is JOHN C PAYNE, and many of you may already have one of my books on marine electrical and electronics systems (The recently published Marine Electrical and Electronics Bible now in it’s 4th Edition) or perhaps one of the many other books on sailboats and yacht systems.

The Mercury Outboard Technical Forum for Answers to Questions

I am not an armchair expert, but a qualified and practicing marine electrician and engineer and a marine surveyor. I do this for a living.  Let this website help you with the boat forum! Thousands of people input with answers to problems.

What is your outboard problem? If you know what the problem is then you are halfway towards finding  the right solution. Why not choose from one of my many books to help you fix your problems. Here are some hot topics for the boat-forum:

Battery Charging How to keep the power on and solve battery charging problems

Engines How to make sure your engine starts every time and how to fix it when it doesn’t

This is just a fraction of the 3000 plus questions that were posted, and it is hoped that this NEW Mercury Outboard forum and bulletin board does the same.

The Forum is also a great place to look for spare parts that are hard to find, share your problems and experience with others, ask questions, share stories and more about my books and related topics and a lot more. Create your own web page every time you submit an article and include great low resolution images as well. 

How to Post Questions to this Mercury Outboard Forum

Forum Editors Forum Rules! Yes there are a few basics when posting!

1. DON'T TYPE IN ALL CAPITALS as it will not be posted. Don't use any HTML code as it will be deleted

2. Don't use bad language or profanity as it will not be posted.

3. To post to the Outboard Forum please at least use a first name and location with your email address in the notification page, so you will get a message when someone leaves a comment.

4. You need to insert a couple of sentences describing you problem and add an image if possible as it helps others. If you insert just a couple of words using SMS speak the system will reject it.

5. Don't Spam the site with multiple submissions.

6. We receive dozens of posts a day and it is quite impossible to reply to more than just a few given this is a free site and I don't have enough time given I have a day job. 

7. It helps if you start the headline with your Mercury outboard engine make/model number or boat make/model number. Save the problem description to the text, more detail means better answers.

Do You Have Mercury Outboard Engine Problems?

Do you have Mercury outboard engine problems? Share it on the Outboard Forum! Whether you are looking advice on an outboard motor or a difficult marine electrical or electronics technical problem then post your story or message here! UPLOAD AN IMAGE OF YOUR PROBLEM EQUIPMENT! Give us a detailed description, short 5 word posts are not much use and will not be posted. Put your boat info, outboard make and model or basic detail in the post title.

Have a Mercury Outboard problem to share?

Mercury outboard engine problems and issues? need someone to try and help resolve them? Then use this forum and maybe someone can help.

What Other Visitors Have Said

Click below to see contributions from other visitors to this page...

Mariner 125 hp 2 stroke 1999 
I am trying to access the 4 carburetors. There is a black plastic cover over the front and I removed the 5 nuts and 2 bolts that hold the carburetor in …

Mercury 60hp four stroke efi Bigfoot 
Engine starts without hesitation. After you shift into forward, it accelerates as it should. Ater it runs at full throttle for a few minutes, the RPMs …

Mercury.200hp four stroke 2020 model. 
No problem but could be my question is on my new no poo at and engine there is no water separator type filter on the pre engine fuel line supply..i noticed …

2019 150 Mercury Outboard 
I bought new tritoon boat last season with a Mercury 150 outboard. Two weeks ago I would bring it to almost full RPS's then hear 6 audio tones and the …

2017 Mercury Foursteoke 150 
I have a 2017 Mercury Fourstroke 150 and have had a problem with the alternator charging. It would run the battery down and then wouldnt start. I was getting …

Mercury Mariner 90HP Three cylinder 1991 s/n0D042985 
The engine starts and when idling away from the dock, is reluctant to take the throttle. It hesitates, acts like it is running on one cylinder, and sometimes …

2006 ,25 EFI ,4 Stroke  
My 2006 ,25hp EFI 4 Cycle has,a, Fuel issue .I can't get fuel to Flow out of VST. I can jump the High Pressure pump fuel flows fine. I'm getting current …

Mercury 115 elpto 1998 
Engine losing power under load. 115 elpto, ran it on some very old fuel inadvertently. It spewed clouds of smoke and died. Replaced fuel, cleaned filters, …

2004 Bass Tracker Pro Crappie 175 
I have 2004 60hp merc 3 cyLinder. 3 carbs. The 2 cycle oil reservoir is mounted to front rite of engine. Now my problem. Got it out early spring an …

2008 Mercury 15hp outboard (F15M) 
Hi, Hoping you folks can help me out.I have a 2008 15hp Mercury outboard (F15M) that started making a knocking noise.Here is what I’m observing - no problems …

1991 mercury 150xr4 
Fuel pump diaphragm split, when I typified out and restarted the engine it idles at 3500 rpm, tried timing adjustment but it made no difference

Mercury, 40eojet30, 1999 
Since last fall the engine loses power. Starts fine, idles fine, no misses. I power up and get on plane in about 30-45 seconds. All okay for about another …

Mercury 1998 90 hp 2 stroke  
When running the boat in idle or slow no alarm sound when try to get up on Plain solid loud alarm sound oil is full and water pump is brand new and pumping …

Mercury 1998 90 hp 2 stroke  
When running the boat in idle or slow no alarm sound when try to get up on Plain solid loud alarm sound oil is full and water pump is brand new and pumping …

mercury 25hp 2006 
i have a 2006 mercury 25hp 4 stroke efi and when i connect the earmuffs it idles and runs perfect but when under a load in the water then i will only go …

1996 Mercury 175 EFI outbaord motor 
I have a 1996 Bayliner Rendezvous deck boat that I have had for several years. Cylinder 3 is dead and I have to repower this beast. There appear to be …

1986 35 hp mercury outboard 
My Name is Bruce. I just cleaned the carb. The engine idled fine. took boat out and it would not plane off. The motor started running on just 1 cylinder. …

1991 Mercury 150 xr4 
The engine is not firing on cylinders 1 and 4 and is not charging replaced both switch boxes and no change. What should I do now?

2014 30hp Mercury 4 stroke Starting Problem 
I have a 2014 30hp Mercury 4 stroke that has been setting for approx 1 year, the gas was not drained. All gas has been removed, fuel tank, hoses/bulb and …

1996 Mercury 25hp wont slow down 
I have a 1996 Mercury 25hp with built in timing advance in the power pack and when backing off the throttle it take forever to slow down to idle and the …

2002 Mercury 225 
Well starter was sticking so replaced the solenoid and did not fix the issue. That did not fix the issue. The issue was the starter was getting stuck in …

2018 mercury 115 four stroke  
I’m having problems getting it to run right, we took it out for the first time today, it is brand new engine so we wanted to break it in. It idled fine …

200hp Mercury electrical problem 
200hp engine blew on my 1999 nitro boat. I found a used 200hp on a wrecked boat. I switched them out and took the boat out. Had to end up switching out …

Mercury 150 xr6 
I have no spark on 2 4 6 I have spark on1 3 5 I switched out outer switch box I now have spark on 4 but not on 2 6 I switched the leads r/w b/w to …

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1995 merc 40 hp wont plane, 3400 rpm 
boat ran great, then suddenly would not run over 4200rpm, down from @5200. barely plane. I eliminated fuel system fromexit of cowl, then all nee fuel lines …

1990 135 hp Mercury black max. How to remove trim solenoids on  
Bought new solenoids to replace the one bad one. I cannot get the old ones removed. The 3 bolts have locking nuts and are inaccessible. Do need to remove …

Mercury 2015 150 Heavy shaking  
I have a heavy shaking starts at 2800 rpm while under load. It's a mercury outboard 2015 150 4 stroke. The motor shake the same way when in neutral and …

Mercury 100 engine issues 
My engine is currently with a mechanic who I frankly think is extracting the urine. The engine is 87 and he is telling me it need a new flux capacitor …

2008 mercury optimax 200 intermittent alarm  
My bass boat has a 08 mercury optimax 200. After launch and idling out of the no wake zone when i was trying to plane off i had an intermettent alarm …

75hp Mercury Bass Tracker boat raising up in front 
My husband has a bass tracker 75hp merc. motor and it is I think about 17 ft long. When we are in the boat traveling quite a distance to our fishing spot …

40hp merc 4stroke runs fine then starts loosing power  
My 2011 bass tracker 40 hp four stroke mercury will start up and run fine for a while then it starts losing power and bogging down to nothing , You can …

Mercury Optimax 225 water pump 
Started my 225 optimax for the 1st time this year and noticed the water was not pumping out of the pee hole. Someone told me it needs to warm up before …

Mercury runs half speed until hot 
My Mercury outboard thunderbolt 50 hp runs at half speed for about 20 min then it takes off like a bat out of hell. It has new plugs sprayed the carbs …

Mercury 115 1994-95 Leaking water from the thermostat  
I have an Mercury 115 1994-95 it is leaking water from the place the thermostat is, other owner told me it was because water here in the north is so cold. …

40 hp mercury jet sounds like it is coughing 
Hey guy I have a 2002 mercury 60/40 jet and it starts fine and will run great but when I back off the gas it runs but it sounds like it is coughing and …

2002 mercury outboard 
I'm having trouble starting my outboard engine on my boat. There is fuel in it, spark plugs are new, oil is full. It seems as though all obvious reasons …

Mercury 90 Problems 
I need some help about the subject, Just 2 days ago, I tested the boat by keying the ignition. all I heard is just click everytime I turn on the key. …

210 h.p. mercury m2 v6 wont rev past 3000 
Got involved with a repo of a Sea Doo Challenger. Parts missing, bottom carb shaft frozen. Not running. Got it running, but wont run above 3000 and sounds …

1988 mercury 60 hp outboard sudden loss of power. 
I have a 1988 mercury 60hp. While running at full speed I began hearing a long beep. Within 30 seconds I had a sudden loss of power, then died. It started …

3L mercruiser i/o 
After taking boat out of winter storage, I attached hose and boat ears turned on water and started engine. It runs if above 3000rpm, but anything less …

77 Mercruiser in line 6 fuel problems 
Hello, my77 glastron 165hp after shut down suddenly started to start for a second and then stall out leaving me getting towed home. I replaced the fuel …

1989 Mercruiser 4.3L Power steering pump Replacement  
I recently bought a boat with a 1989 MercCruiser engine. We had in for its service and now the power steering pump is just bleeding fluid. The tech at …

84 mercury wont run at top speed 
have a 84 mercury on a 84 skeeter boat runs great for 1 to 2 miles and them starts to slow down and want run above 1500 rpms try to thottle it up it well …

60hp 4 stroke Mercury will not idle down 
I had a problem with my 60hp 4 stroke Mercury Bigfoot. Motor would not idle down and not shift into neutral. Local dealership found a tar like residue …

55hp Mercury Boat wont start when in the water 
My husband and I just boat a john boat with a 55hp Merc outboard motor. He cleaned and adjusted the carbs already. He then hooked it up to the hose and …

140 mercruiser wont reach full speed 
have a 1986 mercruiser inboard starts and idols fine runs to about 1800 rpm and falls out when increased throttle rapidly what is the problem? I can mess …

7.4 mpi Mercruiser oil leak? 
I have a 98 Formula 252 SS with a 7.4 mpi Mercruiser, Bravo 3 outdrive.....I bought the boat 3 years ago and have been restoring it slowly...Ive been very …

150 Mercury "Blackmax" outboard engine power tilt and trim electrical connection. 
150 Mercury "Blackmax" outboard engine(1985) -- power tilt is not working -- engine will go down, but will not go up. Makes a clicking noise when switch …

1988 175 HP Mercury 
I have just been given a 1988 Ranger bass boat with a Mercury 175 HP motor. I know very little about boat motors. I can not get it to start. It did …

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6hp mercury seizes up after 15 minutes 
Just got a jon boat with a 6hp mercury 2 stroke. Runs fine for about 15 minutes, then dies. Can't pull to start up again until it cools down. Then repeats …

115 Mercury 2008 Triton runs too slow. 
Three months ago we bought a (new)2008 Triton Cypress Cay Tritoon with a 115 Mercury. We got the boat from "Sport Boats USA" Ozark Mo. When we took …

1985 75 hp Mercury - won't rev in water 
we just bought a 1985 75hp mercury. we had the motor company where we bought it put it in the tank and all was well. we then took it to the water and …

Mercruiser 350 MAG MPI Problems 
So a few weeks ago I was on my 2005 Chaparral Signature 240 equipped with a Mercruiser 350 MAG MPI with a Bravo Stern drive. I used the boat only about …

Mercury 115HP ELPTO Electrical 
I have a Mercury 115HP ELPTO (1989) it runs terrific for almost exactly 40 minutes than dies, it won't start or fire for about an hour than takes right …

1989 Mercury 90 Tilt and trim will not go up  
Tilt and trim will not go up. I checked both relays with ohm meter and both works. Trim will go down and up every once in a while. Checked wires to trim …

mercury 115 four stroke 2015 
when im travelling on the lake say at 3600 rpm don't really seem to matter what rpmout of nowhere it starts to act like its misfiring or running …

Mercury 40 hp outboard keeps blowing fuse for main relay switch 
The boat was purchased in 2011, so it's 7 years old. however, it's probably has less than 150 hours on it. I haven't run the motor in over a year, but …

Mercury 2017 115 ct.  
Idles great, 1/3 throttle takeoff is good up to about 20 mph (gps) then runs on 2 cylinders.acts like starving for fuel. More throttle makes this worse. …

198915 hp mercury long shafts tiller electric start  Not rated yet
When running wide open engine bogs down to a limp mode and will not throttle up let it set or feather throttle it comes back aldosterone choke and speed …

Mercury 75 hp 4 cyl 1983  Not rated yet
Periodically the engine will just “click” when trying to start. Also it periodically just “clicks” when apply down trim and the engine is not running. …

Mercury 40hp ct 2018 Not rated yet
My pontoon boat dies after about 30 seconds at full speed. I changed the fuel filter thinking problem solved but still dies after a little longer at full …

115 hp four stroke, 2015, Not rated yet
When I start engine in neutral and idle for a few minutes to warm it up then advance the throttle above 2000 to 2500 rpm (still in neutral) it surges until …

1999 mercury 125hp Not rated yet
Idles rough, but runs fine up to 2200rpm, then jumps to 3200rpm, when you back off throttle it then drops from 3200 down to 2200rpm. Engine will not …

1999 mercury outboard 200efi Not rated yet
had an intermittent crank no start problem & confirmed i had no spark on cylinders 1,3,5 side of engine so it was recommended to me to replace both switch …

2001 mercury efi 150 with throttle body Not rated yet
My boat starts engages in gear and when I throw the throttle forward to plane it bogs down instead of accelerating. I have changed the water separator …

Mercury 225 EFI 2001 Not rated yet
After running across the lake to our fishing spot, I pulled back on the throttle, but engine did not slow. dropped it back to neutral, but engine revved …

2016 MERCURY 115 ELPT 4S 2.1L Not rated yet
Occasionally the motor starts to miss badly, but then will run fine. You can run fine for long periods of time and then all of a sudden it starts to miss, …

2016 MERCURY 115 ELPT 4S 2.1L Not rated yet
Occasionally the motor starts to miss badly, but then will run fine. You can run fine for long periods of time and then all of a sudden it starts to miss, …

Mercury, 40 hp 2 stroke, 2003 Not rated yet
The motor idles. It will come up to speed 30 mph. After 5 minutes to an hour of driving, the power goes right down. Max speed is 8 miles an hour at full …

2012 mercury 115 exlpt Not rated yet
Considering purchase of a mercury2012 115 exLpt 140 hrs. The motor has been idle for one year. Had it checked out and it starts and runs fine but compression …

Mer 200hp efi 2004 Not rated yet
Not getting fuel. Will start up good and ldel. Will not get up to plain off. My first though is replace spark plugs worked good for about 1/4 mile. Next …

2005 Mercury 90 HP EXLPTO Not rated yet
The gear shift/throttle leaver is extremely stiff when shifting from forward to neutral, N to R, R to N and N to F. This makes manuevering in tight …

2005 225 hp optimax saltwater Not rated yet
I have a 2005 225 hp Optimax. It ran perfectly until the other day. Suddenly when I went to go start it and turned the key the idle was at 1500 to 2000 …

Mercury 200hp 2020 Not rated yet
Once I get trimmed out only getting 5500-5600 rpm with 24 pitched prop on a 200 hp 2020 mercury. Checked the throttle response and I am getting 100%. …

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mecury, 115 1994 Not rated yet
been setting 5 years, only runs on primer, either at carb. when i squeeze the ball fuel comes out of some type of switch with hoses hooked up to it, i …

2015 Mercury 115hp 4-stroke Not rated yet
Starts great. Can run for 5 minutes or an hour then it will start sputtering. The steering wheel snatched and the motor jumps when this happened. No …

2009 Mercury Optimax Sportjet 250 DFI M2 Not rated yet
Engine bogs (as if starved for fuel or air) at higher RPM (>4250). All 3 fuel pumps and all fuel filters have been replaced and the VST has been cleaned. …

Mercury 150 xri efi Not rated yet
I have constant power to the high pressure fuel pump. If I leave the two red wires (red, red/blue) connected it continues to run with the key on or off. …

mercury proxs 225 2006 Not rated yet
engine will start and run for 15-20 seconds and shuts off. engine will only crank over and not start if you attempt to restart it right away. if you let …

2007 Mercury 25 hp 4 strike Not rated yet
I tilted the motor down into water to start. Ran it for about five minutes then turned off and trimmed up. A few hours later my wife trims it down and …

Merc 20 hp 1989.  Not rated yet
Twice, when travelling with the engine in the back of my truck, the engine wont start when on the boat. Is there something about having the engine on …

2003 Mercury model#1041412AD, OT670071, 40hp,. 2stroke, 2 cylinder, ELPTO Not rated yet
I have changed oil pump, rebuilt carburetor, put new water pump in, new solenoid, new prop, new plugs on 2003 Mercury 40 hp 2 stroke 2 cylinder but still …

Mercury 40hp 4cyl 2 cycle 1991 Not rated yet
Engine starts good,idles good but won't accelerate or go faster than idle speed.I was told it may be the high speed stator and this motor is notorious …

150 Mercury 4 Stroke 2012  Not rated yet
Engine has not been run in two years. Drained all old gas. No visible inline water separator filter found. I Plan on doing the 300 hr service. My concern …

mercury 150 xr 2003 or 19 ft triton boat bud broglib@hpw.com Not rated yet
i have a 150 hp mercury xr outboard on a triton boat, batteries are fully charged, when i turn the key on then starter want work, trim want work, gauges …

Mercury 175 EFI 1999 Not rated yet
The engine first time it goes on the water its only running on half power after you fisk for awile you start it and it runs fine. I replace the ignition …

Mercury 30 HP 4 stroke EFI 2005 Not rated yet
The motor starts runs just fine and smooth in idle and when you push the throttle forward it runs at half or less speed like it has lost top end speed. …

Mercury 30 HP 4 stroke EFI 2005 Not rated yet
The motor starts runs just fine and smooth in idle and when you push the throttle forward it runs at half or less speed like it has lost top end speed. …

Mercury 30 HP 4 stroke EFI 2005 Not rated yet
The motor starts runs just fine and smooth in idle and when you push the throttle forward it runs at half or less speed like it has lost top end speed. …

1B387673 Not rated yet
Engine sat for two plus years without being started. Have completed the following. -Replaced fuel filters. -Replaced high pressure fuel pump & sleeve. …

Mercury Model 1115F531D 115HP SN 2B153902 Not rated yet
Battery was dead. Battery cables were damaged. shield was scraped off (long story). When replacing battery and cables polarity was reversed! after proper …

Mercury 2004 175 hp optimax Not rated yet
Upon reaching planning speed the tach reached 6k and the engine shut down to idle. The sound from the engine was no where close to high rpm. After stopping …

Mercury Pro XS 150 2012 Not rated yet
Replacing my lower unit first timer and I can't get unit to go all the way up. I'm sure shaft is not lining up right but wanted to get tips on how …

Mercury Pro XS 150 2012 Not rated yet
Replacing my lower unit first timer and I can't get unit to go all the way up. I'm sure shaft is not lining up right but wanted to get tips on how …

Mercury 25 ho bigfoot 4 stroke Not rated yet
Hello all . I have a 01 mercury 25hp carbbed 4 stroke.this has always had a slight hestation at about 1/8 throttle to 1/4 throttle.if yiu go slowly through …

Mercury 150 XR6 2007 outboard Not rated yet
Needs to be choked excessively to get motor running, then onward throughout the day. The gas ball is often not full and needs to be pumped. Once running …

Mercury 225 CXL EFI 2004  Not rated yet
I have 2004 twin 225 EFI with 740 hours on 94 Intrepid 268 with old controls and gauges not sure if 94 or 2004 plus wiring behind dash is very sloppy …

Mercury 25. 1997 Not rated yet
Having trouble with our motor. It has been stalling and not starting after. We have been having trouble most of the summer. It would run a few times …

2005 115 4 stroke Saltwater Not rated yet
Motor cranks every time and idles great but it takes forever to plane out. Changed fuel and filters and all spark plugs. Seemed to do better when first …

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mercury 70 1977 Not rated yet
I have a 1977 70 Merc, that I have on a 14 ft McKee craft I've been redoing which was for my father n law that passed away 5 years ago, when I first started …

2019 Mercury 150 four stroke outboard Not rated yet
Bought a new tritoon, ran it through the 10 hour break in and then started having issues with the motor losing power and shaking, I get a constant alarm …

Mercury 115 hp pro xs 2019 Not rated yet
Motor would not start , checked battery it is at full charge . It would act like a low battery ,just give a short click noise to start engaging starter. …

Mercury 2002 2 stroke 25 hp manual start Not rated yet
Motor was running fine. Cranked first time every time. After a couple of days tried to start and no fire at all. Installed 2 new spark plugs, 2 new ignition …

Mercury 2002 2 stroke 25 hp manual start Not rated yet
Motor was running fine. Cranked first time every time. After a couple of days tried to start and no fire at all. Installed 2 new spark plugs, 2 new ignition …

2006 Mercury Verado 200hp efi v6 Not rated yet
I replaced everything in the fuel supply module due to the motor not starting. When I dump all the gas out of the FSM then turn the key on I can hear the …

Newer Mercury 30hp 4 stroke  Not rated yet
My name IS Josh and I was out on the lake with my father in-law fishing its his Boat. We were cruising at top speed on calm smooth water and the boat died. …

Mercury 15hp ego 2020 Not rated yet
Starts right run for a few minutes then dies may start back up and dies. As if it isn’t getting any gas. Dealer said bad gas, dumped gas put in new emptyed …

1991 Mercury XR6 150 HP Not rated yet
The motor runs great and no performance problems. I has 3 battery's (2) trolling and (1 Start. It has a Marine Industry 3 bank charger and all ports …

mercury 40hp 4 stroke 2018 Not rated yet
Motor seems to have lost power and top speed. Came with a 2018 bass tracker heritage edition bass boat. I was able to get 33mph single passenger and now …

Mercury, 150 HP four stroke EFI, 2012 Not rated yet
Idles fine. Gets on plane then the RPMs start fluctuating down and the RPMs drop as the engine starts to shake. Pull back tonidle and try again. It does …

Mercury 40ELPT 2013 Not rated yet
Hello, I own a 2013 Mercury 40Hp 4 stroke 3 cylinders, for several reasons I left my boat sitting for over a year, I put fuel stabilizer but I didn’t drained …

Mercury 90 2 stroke 2005 empties sw Not rated yet
Outboard tilt/trims on its own.Helm Switch and helm connections all good.Outboard switch and connections appear good and sealed.Can bad relay or relay …

Mercury 225 Pro XS 2020 Not rated yet
Cranked this morning and ran fine for a couple of miles. Slowed down and motor died. Would not restart. Sometimes it would crank and run very rough …

Mercury 90CT 2018 Not rated yet
I have about 170 hours on a 2018 Mercury 90CT Four Stroke attached to a SunTracker 20' Party Barge. Recently, after running it at approximately 4,000 …

1999 merc. 75 hp Not rated yet
Motor was running fine was at speed. Then died like out of fuel. Would only start up if u had it n neutral and throttle way up. But dies when u try to …

Mercury 25HP 1996 Not rated yet
Just looking to purchase a fresh rebuild 1996 25hp Mercury tiller handle, short shaft, electric/pull start, manual tilt and wanted to see what type problems …

Mercury 150 4 stroke, 2B059417 Aug2013 Not rated yet
Hi, I have dual 150hp Mercury 4 strokes 3.oL setup on a plate aluminium 27ft boat. Port engine will not start as I have no spark. I turn ignition on …

2007 Mercury 4 stroke EFI 90 HP Not rated yet
I am getting four or five beep tones that reoccur every 3-4 minutes while underway. Idles without beep tones. I drained the fuel thinking it was a water …

1988 Mercury 35HP B395053 Not rated yet
My motor will only start when trimmed up partially, it in the water deep enough to still suck up water and pee, but on initial start up it will only start …

2007 15hp Mercury 4-stroke Not rated yet
When I go to cruise at max RPM/Full throttle it sounds like the motor is making a subtle "backfiring noise." If I wanted to stay at full RPMs I could, …

Mercury Optimax (Four Stroke 6 PS) 2002 Not rated yet
The engine has just over a thousand hours of operation. It ran very well until the end. After turning it off in the harbor it started only with hand throttle. …

1992 Mercury 150 xr6 Not rated yet
Boat has ran great since the day I bought it took it out last Sunday and it ran fine all morning while fishing started right up and came up to plane as …

115 merc outboard 2016 Not rated yet
First off, I'm new to boating. So go easy on me. Its on a hurricane 187. At full throttle I can only get the rpm up to 4500. I bought it gently used …

Mercury 125 Hp , 2004 Not rated yet
My engine runs very good 3 months ago , then it start with problems. I got to a Mercury service and they told me I have water in my tank. They clean it, …

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Mercury blackmax 135 2 stroke Not rated yet
Misfire At idle and stalls occasionally but runs fine otherwise. This started two years ago with just a slight misfire at idle but always started fine …

2016 Mercury 4 stroke 115 CT Not rated yet
Throttle up to 5000 rpms - runs for 5 to 10 seconds and seems like it shifts into a higher gear. Rpms drop 400 but speed is consistent. Can apply more …

1998 Mercury 90 HP 2cycle. Not rated yet
The motor is operating at high altitude 6000ft and I retarded the timing and put on a smaller prop. When the motor is WOT (actually backed off a bit due …

Mercury, 9.8 Two Stroke. Brown band circa 1984.  Not rated yet
I have cooling problems, replaced impeller and have a good flow of water from tell tale, but the flow stops intermittently and restarts after about 20 …

2017 Mercury 40 hp 4 Stroke Not rated yet
When I turn the key I get the beep, but there is a 2-3 hesitation before the motor starts to turn over. After a couple tries, the motor starts and runs …

Mercury 50 HP 2-Stroke/2000 Not rated yet
I’m the original owner of this motor which sits on a 20’ Bennington, since day one this engine has always struggled to run smooth at 2000 RPM. At 3000 …

2006 90 hp 4 stroke EFI Not rated yet
The motor statrs and idles great, but when I try to go above 3000 rpm a steady alarm goes off and the motor shudders. I've replaced plugs, fuel line …

2006 Mercury 90 hp efi 4 stroke Not rated yet
Starts and idles great, but if I try to go above 3000 rpm a steady alarm goes off and the motor starts shuddering. I've changed plugs, hoses, filters, …

2007 Mercury 60HP EFI 4 stroke Not rated yet
Let me start by saying this boat sat for 3 years (2010-2013) and we had major varnish build up despite having Stabil in the tank. Before we ran it, we …

2006 Mercury 115 EFI (4 stroke); 2007 18' Crestliner Mirage Not rated yet
Intermittent problem: On startup, the tack will read 1500 rpm, even though I can hear that it is running at the normal 700. Upon acceleration, the tach …

1984 90hp mercury Not rated yet
I have a 1984 90hp Mercury...The motor started running for short time then died just like shutting the key off.. When I turned the key to restart it, it …

2016 Mercury 4-stroke 90 HP Outboard Not rated yet
We bought the boat in 2017 with the 2016 engine already mounted. Recently we start the engine at the marina, take it slow out of No Wake zone and keep …

1990 Mercury 200hp xri efi Not rated yet
Engine starts and runs great out of gear. Put in gear and it bogs, only getting maybe 1800 rpm. Back in neutral, 6000 R's possible. Have replaced entire …

Mercury,200 pro xs , 2012 Not rated yet
Fished all day yesterday no problems, came to ramp towed a boat in for half mile , sitting at ramp waiting to load boat, it beeps one time and cuts off, …

Mercury 75 HP EFI, 2015 Not rated yet
I have power to the dash and to the engine positive and negative posts with my a brand new battery. The engine trim relays click when button is pushed, …

Mercury 15 hp 4 stroke 2006 - Runs great dies after an hour Not rated yet
Hello, Thanks for any help you can offer. My motor starts in 1 or 2 pulls no problem. Runs perfect for over an hour at all speeds and rpm. After …

2013 mercury 50 hp 4 cycle Not rated yet
It runs fine for a couple minutes at wot then dies , It will stay running at wot as long as I keep filling the fuel bulb. Just got this from a dealer that …

Mercury 2009 90HP EFI 4 stroke Not rated yet
Just bought a used boat with a 90HP EFI 4 stroke motor. I started familiarizing myself with the motor and have identified I need to replace the air filter. …

Mercury 1A25311FK 2010 Not rated yet
The tiller support has broken and needs to be replaced. I think the break could be welded successfully. I need to know what to disassemble to do this repair …

Mercury 90 hp 2008 serial 1B691844 Not rated yet
I am experiencing a problem as of lately. I’m experiencing a surge or sometimes a rough idle at times. I have also been trying to push in the lower …

2005 optimax 150hp 2 stroke Not rated yet
I had my water pump replaced last year along with new thermostats also and now after sitting for a couple of months the starting it every other week I …

1991 mercury 2.5l 200  Not rated yet
Motor starts and idles fine when you put it in gear it will not get on plane now. Before it would seem like it was bogging down then it would take off …

mercury 50 hp 2 cycle 1981 serial #5634516 Not rated yet
water exhaust stream extremely hot - can't hold your hand under it. Have replaced the impeller on the water pump. Stream is intermittent -- takes a bit …

1982 Mercury 80hp ELPT Not rated yet
it's a two stroke that starts up fine, idles properly, but when I advance the throttle ,...unless I throw the lever all the way forward, it sputters and …

2017 60HP 4 Stroke CT Not rated yet
I started the engine last week and it made a sort of backfire sound and stopped. Could also have been the sound of sudden hissing air during starting. …

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2002 mercury 50 hp 2 stroke ELPTO Not rated yet
warning buzzer stays on as soon as key is turned on.hard starts would rev up ok and die when put in gear.will only run at about 1500 rpm at full throttle.reverse …

mercury kf7, 389738 1949 Not rated yet
I have a 1949 model kf7 merc super 10 and I am in need of ignition parts. Coil, condensers, and points, can you point me in the right direction to get …

Mercury115 4 stroke 2004 Not rated yet
Engine oil leak with no visible source. Pulled cowling and side panels. Oil appears to come out dip stick. Replaced dip stick. Still the same. Oil slick …

Mercury 75 ELPT EFI 2018 Not rated yet
Motor cavitates at about 3600 RPM or above on 20 ft Harris pontoon Runs better with full tank of gas & passengers in back. Has 20 inch shaft. 4 blade …

Mercury 75 ELPT EFI 2018 Not rated yet
Motor cavitates at about 3600 RPM or above on 20 ft Harris pontoon Runs better with full tank of gas & passengers in back. Has 20 inch shaft. 4 blade …

2011 Mercury 60 Hp EFI Not rated yet
My boat won't start. It has spark to all 4 plugs and has 43 PSI at the VST. It's getting fuel all the way to the injectors but it will not spray fuel when …

Mercury 35 hp 2 stroke Not rated yet
When running my 35hp mercury electric start power tilt outboard motor I hear a beeping sound coming from the quicksilver gear shifter what causes that …

1982 Mercury 115hp L6 tower of power Not rated yet
I took the boat out yesterday and it went to full throttle and after about 5 minutes it bogged down and wouldn't go to full throttle again as if was bogging. …

Mercury 60ELPT year: 1996 serial number: 09924843 Not rated yet
Problem: RPM higher than 2500 than engine stutters. Max.RPM: 3000 Problem suddenly occured. Caburetors are cleaned. Diagnosis Stoboscope light for …

2011 Mercury 4 stroke 9.9hp Not rated yet
Engine starts with no problem. In neutral I can rev the engine wide open. Only did it to make sure it would. I put it in gear and the engine runs smooth. …

2016 50 hp 4 stroke Mercury  Not rated yet
My issues has only happened a few times out on the water. The motor seems to surge/bog when throttling up. I only run non ethanol rec fuel. I bought the …

2020 mercury four stroke 115 Not rated yet
power trim problem trims up a bit then stops before motor gets peak rpm i get 4800 to 5000 got 6000 rpm when it was new also trims down when you try to …

Mercury 115 on a Mako 191 will not plane Not rated yet
My engine is running good and in the test tank it runs great at 3000+ RPM. When on the water at full throttle it take several different maneuvers to eventually …

Mercury 175 hp 2 stroke 1989 Not rated yet
Have good equal compression in all cylinders, and runs great in forward motion as long as you start out fully trimmed under. But if not fully trimmed …

mercury. 60 hp 4stroke bigfoot, 2014 Not rated yet
Starts very good and idols fine and accelerates good but when I decelerate it wants to quit. It will start right back up and run fine until I back off …

Mercury Verado 150 outboard 2011 Not rated yet
Hello, I am having problems with my motor stalling out once I start to throttle up a little, and then it won't start up again. This has happened twice …

Mercury 8 ELH 2020 Not rated yet
Pull chock out two clicks and motor starts. After warming up, I push the chock in one click and the motor dies immediately.

mercury 100hp outboard Not rated yet
It is a 1988 Searay Seville, 16.5 feet, with a 100hp mercury outboard in Searay colors. There is a loose ground wire in back, near the fuel tank and …

1982 mercury 35 hp Not rated yet
Primer bulb never gets hard wont stay running all the time but ran at wide open throttle. I cleaned carb and noticed the float was full of fuel. So I replaced …

2005 Mercury Optimax 150, have twins starboard side issue Not rated yet
Starboard side engine idles rougher than the port side motor, and when I've run it for an hour it will die at idle. Starts right up and will run as long …

Mercury, 135, 2005 Not rated yet
Engine stalls after running for a few hours. Replaced the kill switch. Tried to start it, wouldn’t start. Unhooked the kill switch. Engine starts but gas …

1995 Mariner 150 magnum  Not rated yet
Just installed a new control box(before this engine ran fine. After getting new box and cables installed I took it to the water. Engine fired right u,checked …

2010 Mercury Opti max dfi 3.0 Not rated yet
Fuel pump won’t turn on when I turn the key in the on position, therefore the motor won’t start, but will turn over. No fuel in the lower or high pressure …

Mercury Outboard 1997 125hp Elpto 2x2 Not rated yet
Recently purchased 1997 Starcraft starship 2005 with 1997 Mercury 125hp Elpto 2x2. I recently had a tune up completed with new spark plugs, fuel filter, …

1984 mercury 175 blackmax Not rated yet
last time i took the boat out it ran fine on the way out then my brother wanted to troll and we were using the main motor barley running to troll for a …

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2014 mercury optimax 200 sport jet Not rated yet
The main power relay continues to click with the key in the off position, have to disconnect the battery to get it to stop. When the battery is connected …

2002 Mercury 125 Elpto Not rated yet
When is cold it runs really well. Approximately 31 at WOT. After I stop and sit for a while and then take off again I can only get to around 25 or 26 WOT. …

74 or so mecury 850 thunder bolt  Not rated yet
Motor was running fine out on the lake and suddenly shut down , thought I was out of gas so switched to other tank and it started up and quit , started …

Mercury 225 EFI 2001 Not rated yet
It quits running like its running out of gas. it fires right up and runs for a short time then stalls again. There is fuel in the filter right before the …

Mercury, 1A51413KZ,50ELPT 4S 2011 Not rated yet
I took the boat for a 1 hour drive yesterday and ran it at several different RPM's. On my why back home I'm going thru some canals so I'm running about …

Mercury 60hp four stroke efi Bigfoot Not rated yet
Engine starts without hesitation. After you shift into forward, it accelerates as it should. Ater it runs at full throttle for a few minutes, the RPMs …

mercury 250 pro xs 2004 Not rated yet
something broke, probably a gear issue in my lower unit. i am a tournament angler and getting this fixed quick is impossible. mercury won't even ship …

Mercury 2917 40 hp with 7.5 engine hours Not rated yet
I bought a used Tracker 2017 Super Guide the engine only had 7.5 hours From Cabela’s . I took it out and and ran it, after awhile the engine seemed to …

2015 Mercury 150 HP 4 Stroke Serial 2B200735 Not rated yet
5 years, 190 hours, cocktail cruiser pontoon in Indiana. Prop contacted lower unit housing and machined it out by a good 1/8 inch or more. Machined internal …

2015 Mercury 150 HP 4 Stroke Serial 2B200735 Not rated yet
5 years, 190 hours, cocktail cruiser pontoon in Indiana. Prop contacted lower unit housing and machined it out by a good 1/8 inch or more. Machined internal …

2005 mercury 200 optimax Not rated yet
My motor idles and runs fine at mid to low rpms but at high rpm it starts starts sputtering. I changed the fuel filter but the problem persists. Has anyone …

1998 150 hp efi mercury outboard  Not rated yet
i have purchased a boat that has set for 7 years. we cleaned the fuel system out and it fires when we force feed mixture to the block. i have replaced …

2015 Mercury, model 1115f531d, 115hp, ME command thrust  Not rated yet
This 2015 Mercury 115HP is a Command Thrust. It is on a pontoon boat. For 5 years during the summer months we always kept the motor down in the water. …

2016 merc 115 hp 4 stroke model 1115f131d Not rated yet
Had for 3 years just started having , problem I can take off from dock go a few miles run about 5300 the guardian mode kicks in showing 170 degrees soon …

mercury marine, 90 Elpo, 1999 serial# 0G812434 Not rated yet
1999 nitro 700LX same Alarm that tells me when oil reservoir goes low goes on when engine is turned on and does not go away, pumps water very strong, oil …

Mercury thunderbolt 81 outboard Not rated yet
So about a month ago I went fishing motor ran great got me out to where I wanted a fish. I went to crank it over to get home and it would just crank it …

mercury 85hp. 858f8a- 1862 Not rated yet
would like to know timing angles-wont start and run with top cylinder plug wire on-it backfires and kicks itself -compression on all 3 cylinder is 90lb. …

Mercury 115hp 2 stroke 1995 Not rated yet
I need to find the installation location for a CDI voltage rectifier/regulator. I know the correct wiring landing, but this used motor did not have a voltage …

Mercury 115 EFI 2008 Not rated yet
Engine starts but sometimes slight shaking, starts fine, idles fine, takes throttle fine. When at WOT engine only gets to 3200 rpm. It used to run upwards …

Mercury salt water 90hp 2002 Not rated yet
Boat fires up and runs good out to where we hang out on river hang out all day and make it to the ramp it dies and will not start back get it loaded up …

Mercury,115F231D,2016 Not rated yet
Found water in engine oil. Seemed like a teaspoon came out right away when draining oil. And after draining seemed like water dripping out.

2011 Mercury Optimax 150 Not rated yet
when the motor is off, it raises and lowers normal. When motor is running it will only trim a little and then stops. If I need to raise it more, I have …

75 hp mercury 4 stroke 2001  Not rated yet
Just had carbs cleaned, new fuel pumps and oil change. Made one lap around the lake and got it warmed up and then shut it down and checked oil. Oil look …

Mercury xr2 150 blackmax 1987 Not rated yet
changed out the stator cause it went bad now the motor runs fine st idle when I go to take off at wot it gets up to 3000 rpms and holds there for about …

tracker by mercury marine 2stroke 60hp outboard 2006 Not rated yet
when I shift into forward position while in water I have no issues but when I try to throttle back a little bit it feels like im bout to pull the throttle …

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mercury 115 hp tower of power 1986 Not rated yet
idles fine revs up in neutral and in gear with muffs on, put in lake won't rev up. replaced plugs, fuel pump, fuel lines, primmer ball, rebuilt all three …

2016 Mercury 25hp outboard  Not rated yet
When cold, starts and runs fine. After puttering around the lake 2 -3 hours and shut off, then will not restart. Only until it gets cold will it restart. …

Mercury 2014 150 HP 4 stroke Not rated yet
Starts fine idles a couple minutes starts bogging down kills, get a 6 beep, none critical, error code. At start if I idle up no beep code runs fine, just …

Mercury Marine 60ELPTEFI 2005 Not rated yet
Hello! So, the other day with only my wife and myself on our 22' Princecraft pontoon boat we found that we could only achieve 10mph and the motor would …

2005 mercury 50 hp 4stroke Not rated yet
I made the mistake of crossing the battery cables thenraised the trim up when it stoped I turned over the key to here it turn over but it did nothing I …

Mercury model#1043412wd 40 hp. 1999 Not rated yet
It keeps fouling plugs. It started fouling set plugs every other trip 2 lake now will start n run long enuff 2 foul plugs i have bypassed oil mixer i mix …

Mercury 150 xl pro xs Not rated yet
2019 Tahoe 1950 boat was delivered on 5/1/20. Runs great and for a long time at low speed/rpm. Increasing throttle to 3,000, and after about 90 seconds …

murcury 90 hp EFI 4 stroke, 2010 Not rated yet
oil warning signal started, and I could hear a spurting or sucking sound. Oil was leaking out very quickly. This was the first ride of the year. It …

mercury xr2 150 1984 Not rated yet
We have been having trouble with this thing every since we have bought it. I have bought all new electronic parts, rebuilt the carburetors, and rebuilt …

1989 Classic Fifty 45 hp Not rated yet
Motor seems to run fine however does not have the power it should. Have had fuel problems but don't feel it is reaching proper RPM's. Have ordered a Tach …

Mercury 60 EFi 2009 mod, interference or non-interference engine? Not rated yet
This is not so much of a problem, but ive search all over internet and called Mercury dealers here in Norway with no luck to my question. I was just wondering …

225 Mercury offshore 1996 Not rated yet
Our 1996 Mercury 225 offshore outboard will run fine in the morning but after going 20 plus miles out and then stopping to fish it will start to run rough. …

1966 mercury 200 20 hp Not rated yet
I cannot get water to circulate through the motor. I’ve replaced the impeller and it pumps water when turned with a drill, but no water goes up the water …

Mercury,60 hp,2000 Not rated yet
I had to rebuild the tilt trim cylinder I reinstalled on boat it will trim down but not up it will work both directions if not attached to motor with motor …

mercury, 115, 1988 Not rated yet
While loosening a bolt on lower unit the lip or anti-ventilation ridge on the midsection (exhaust housing) busted. is it necessary to repair this?

1987 Merc Outboard 6M Not rated yet
I have what I believe is a 1987 Mercury Outboard 6M. It was in a basment the basement got flooded. I got it running with a carb clean, new spark plugs …

1987 Merc Outboard 6M Not rated yet
I have what I believe is a 1987 Mercury Outboard 6M. It was in a basment the basement got flooded. I got it running with a carb clean, new spark plugs …

Mercury 9.9 1995 2 stroke Not rated yet
This 9.9 has very few hours, and hasn't been used for awhile before I bought it. I installed a new water pump as a precaution. I took it out and it started …

Kiekhaefer Mercury, Merc 200, 1973 Not rated yet
Hello: I need to replace a prop on this outboard. The existing propeller is a 3 blade. The diameter and pitch stamped on the prop are illegible. I …

Mercury 94 150HP XR6, Outboard, 2 stroke  Not rated yet
Went to start it up after sitting idle during the winter, new plugs, a little lubricant in the cylinders, fresh charge on the battery and no start. I …

Mercury 94 150HP XR6, Outboard, 2 stroke  Not rated yet
Went to start it up after sitting idle during the winter, new plugs, a little lubricant in the cylinders, fresh charge on the battery and no start. I …

Mercury 40 hp Bigfoot 4 stroke 2010 Not rated yet
Stored boat outside winter of 2019 and in the spring noticed the lift cylinder had frozen and cracked. Had the lift cylinder repaired with a new cylinder …

Mercury, 150 hp 4-stroke, 2013 Not rated yet
Has anyone had an issue with the Mercury outboard momentarily losing power (mph/rpm drops) for no apparent reason at medium to maximum throttle settings. …

Mercury 50 hp 1986 Not rated yet
Motor has not run for 12 years. Two carbs. I have cleaned the fuel tank, I have fresh fuel and oil mix and added a can of sea foam, have changed the plugs, …

mercury 90 2 stroke 2000 Not rated yet
I have a 2000 Mercury 90hp 2 stroke on a pontoon boat. I takes a while to warm up, stalls out at idle in neutral. In gear it will not go past 2000 rpm …

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1989 Mercury Black Max 150 Not rated yet
This started last year. Engine starts fine and idles fine. Once I move the throttle, there is no engine response until I get about 2/3rds throttle, it …

mercury/ 2.5 200 efi/ 1998 Not rated yet
motor is on a 1990 19' panteraII basscat. Just bought the rig. Fixed iat sensor, had injectors cleaned, deleted the 2 little bowes on port side. Forgot …

1993 mercury 200xri  Not rated yet
I have a mercury 200xri. I was going down the lake and all of a sudden the boat lost speed and sat down. Now the boat won’t go into gear. The throttle …

merc 50hp two stroke, three cyl. 1996 Not rated yet
My 50hp two stroke surges at about half to two thirds throttle. But, will reach wide open throttle and run ok there. What causes this. It has fresh …

2010 Mercury Optimax 115 hp Not rated yet
Just bought a used 2010 boat with a 2010 Merc Optimax 115 OB motor. First time on the water, I trimmed it up some and the motor shutoff. Is there an …

Mercury '95 2-stroke 90hp, S/N 0D114247 Not rated yet
Used boat that has a motor that won't start. I just submitted this same issue but only 1 of the 2 photos went. I probably did something wrong when submitting. …

Mercury '95 2-stroke 90hp, S/N 0D114247 Not rated yet
I bought a used '96 Nitro bass boat. The motor wouldn't even turn over. After finding that the solenoid was bad & replacing it, now it turns over nice. …

2002 90ELPTO Not rated yet
Whenever I push down throttle the Throttle Control Rod pops out of the bushing. I've replaced bushings and it is still popping out at higher rpm. I do …

Mercury 60 2008 Not rated yet
Hi, Looking for advice. Noticed a hole in the top of the left bottom end cover of my outboard which hadn't been machined, looked more like a burn through. …

mercury pro xs 2007 Not rated yet
Replaced engine oil tank, primed system by turning key on and going from neutral to forward 3 times. It did its thing but now has a check engine on the …

2009 mercury outboard 90hp 4 stroke refi Not rated yet
the boat has been sitting for the past 4 years the motor only has 35 hours on it but has been service atleast twice a year I took it out for the first …

mercury 150hp four stroke 2015 Not rated yet
Im in the northeast, just bought a boat with a 2015 mercury 4 stroke 150hp motor when I put the water muffs on it in my driveway it starts, idles a little …

1998 mercury 50hp 4-stroke/4cylinder Not rated yet
I need to change the water impeller,but I don't know how to disconnect the shift shaft. does anyone know of a video site that will show the proper procedure? …

Mercury 115 4 stroke 2010 Not rated yet
I was in riding in my boat when the audible alarm did a continuous beep for about 5 seconds and then engine bogged down and stopped. I could restart engine …

mercury, F225 EFI4-Strke, 2004 Not rated yet
Drained 5 year old gas from boat, replaced with 10 gallons non-ethanol gasoline and 1.5 cans of Seafoam motor treatment. Started engine at home ran rough …

Mercury 100 EFI 4 Stroke 2012 Not rated yet
Died today at 488.4 hours, had to be towed by police back to safety. Mercury Service Centre says its the Oil Drive and may as well replace the motor? He …

Mercury 40HP 4 cylinder 1995 Not rated yet
Same issues as others I have read. Engine idles fine, but when I go to 1/2 to full throttle engine goes well for 30 seconds and then bogs down and then …

Mercury '94 90hp Not rated yet
I bought a used bass boat without first turning the steering wheel. The steering cable was frozen (corroded) in the tilt tube. I've gotten the cable out …

Mercury 200 xri 1996 Not rated yet
starts fine idles great 1st thing after you run down the lake and stop it will start again with in 5 minutes. If you fish for 1 to 2 hrs it will not start …

Mercury 4 Stroke 150 hp 2017 Not rated yet
The engine won't turn on suddenly. The trim worked for a moment then also stopped functioning. No noises are coming from the engine and no leaks from the …

Mercury Optimax 250 Pro XS, 2008 Not rated yet
After being on the water and using the motor intermittently during the 5 hour session, I get the boat on the trailer and out of the water, attempt to tilt …

mercury 135 2005 Not rated yet
Starts right up runs great if you but it in revers its fine when you put it into forward it stalls but if I get it to go when you jump on it just before …

Mercury 30 hp EFI 2011 Not rated yet
Not getting gas out from fuel pump inside SVT. I can run the motor straight off of battery, but it won’t run plugged in. It won’t prime when started, …

Mercury 90hp Fourstroke 2014 Not rated yet
I cant seem to get the motor to trim/tilt up. I can only get it to go down. To get it to go up I can swap the wires at the relays and use the down button …

2006 mercury 15hp 4 stroke - Idles fine and stalls at accel Not rated yet
I am troubleshooting a new to me 2006 Merc 15hp:it had an accel pump housing leak and I fixed that and changed the diaphragm that was too stiff. Then motor …

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Mercury, 75Hp four Stroke/75ELPT4S, 2017 Not rated yet
Discolored Engine Oil. I bought the motor brand new in early 2017, live in Wisconsin. I used it every other weekend during the fishing season of 2017. …

2017 mercury verado  Not rated yet
Almost once or several times a day when I give power to get on a plane it will go to idle and a steady beep occurs. I then shut down and restart and it …

2016 Mercury 60 HP 1A60413BZ 4CY Not rated yet
Motor has only been cranked 4 times the last time was in June 2016, It has fresh gas and I would like some expert input of what exactly I need to do before …

2008 30HP OUTBOARD Not rated yet
I am using this on a 1975 Boston Whaler sport.Do not have middle speed. Either fast or a crawl. I already disassembled the shift control box and cleaned …

mercury 225hp 2006 Sn 1B291136 Not rated yet
Motor starts and runs at idle easily. It will run smooth until you start to accelerate and about 3000rpm it starts missing and will not go over 3000 …

2015 Mercury 60hp four stroke. Not rated yet
My alarm goes off (3 beeps/repeatedly) after 5 minutes while at top speed. If I back off the throttle the alarm stops and I can spped back up for another …

2008 50hp mercury 2 stroke Not rated yet
Engine starts and idles fine, but when trying to accelerate engine just dies. I can tool around the lake at idle speed no problem. Can't get the rpm's …

Mercury F25ELPT 2007 serial# 0R181035 Not rated yet
When I am just reving the engine with just throttle (button pushed not in gear) it revs up nice and high and wants to scream at WOT (basically runs great) …

1996 Mercury 200 EFI,  Not rated yet
Became hard to start, ran it up the lake and when I poered down it started running rough. When I took the cover off I see Fuel dripping from the filter. …

Mercury F25E sn # 0R-140066 YR 2006 Not rated yet
I have 2 of these engines but I have a Yamaha 703 10 pin Remote control. I have the color code for the 703 connector but I need to know what is the color …

2003 Mercury 200 EFI Saltwater Motor  Not rated yet
Start and idles great ! It will die running full speed or some time it die when exhilarating hard. But it always restart. We have check fuel pressure on …

Mercury 60 hp efi 4 stroke 2013 Not rated yet
Doing this in the yard with engine flusher on. Engine cranks fine. Idles fine. Rev it up it sputters then clears up at 4000 rpm. Bring it back to idle …

Mercury 2008 90 elpt efi 4 stroke Not rated yet
Having an idle issue after I run it awhile. Cranks right up and runs perfectly, but once I take a ride it doesn't idle correctly. Just did a 300 hr. + …

Mercury 40hp EFI 2013 Not rated yet
Outboard not starting. Dad put the boat away a couple of years ago without setting it up for winter or storage. The engine has less than 2 hours on it. …

Mercury Classic Fifty (45hp) 1988 Not rated yet
Took the boat out to the lake today for the first time this year. Went to drop it in the water and i could not get any fire. Turns over great but will …

Mercury Classic 50, 1986 Not rated yet
Newbie Mechanic. recently bought a 1986 Classic 50. when I removed the lower unit to replace impeller, 2 plastic pieces fell on the floor. I think they …

Mercury, Big Tiller 90, 2018 Not rated yet
The guy who bought this boat used it for panfishing, so he did not need troll control. Am I able to add the troll control rpm button to the handle where …

2001 mercury 200 go xr6 carb Not rated yet
The boat bogs it feels like there’s something holding it back it runs 5700 rpm at 57 mile an hr which is slower than it used to be by 7 mph when you turn …

Mercury Optimax 90 hp 2005 Not rated yet
I have a problem with vacuum at pulse line for lift pump at vst. I have good compression, I pulled intake to check reeds, they are perfect. I don't why …

2004 Mercury 115 EFI four stroke  Not rated yet
My mercury 115 EFI four stroke develops an engine miss at around 5000 rpm. The rpm drops approx 200 to 400 rpm. This miss comes and goes. It appears …

1984 50 hp mercury Not rated yet
I just replaced the reed valves in my motor and now after three trips to the lake the motor runs out of fuel when you go to full throttle. It will idle …

Mercury 1974 85hp Serial #3868900 Not rated yet
I am looking to buy this motor. Does this year have any inherent problems I should be sure to check out before buying. I have seen it running and it …

2002 mercury/90ELPTO Not rated yet
The motor won’t go in to forward or reverse. The throttle works fine. There is a button on the throttle handle that allows you to throttle up in neutral. …

1999 Mercury 115 saltwater series outboard Not rated yet
Hello. My name is Jason. I live in Florida. Unfortunately my boat sat for 4-5 months and got water in the fuel tank from sitting. I always run rec fuel …

2003 60hp four stroke mercury Not rated yet
Hi everyone, my engine ran fine for 20mins or so then while on the plane it started to alarm constantly, I backed off to an idle but still in forward gear …

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Mercury, 50HP 2 Stroke 2004 Not rated yet
was motoring along nicely at around 30KM/hr when suddenly the motor lost power and shut down but something continued to rattle for about 20 seconds after …

Mercury 2004 60ELPTEFI 4 stroke serial # OT840910 Not rated yet
The boat is on a trailer, so any running must be done with muffs. I was adjusting the shift cable at the motor to find the best neutral position on …

mercury 25hp outboard 2cycle 1983  Not rated yet
Hi all: I have a problem with starting my 25hp when cold > Does anyone know of a way to go about installing a after market style choke ? The type of choke …

1978 Mariner 115 Not rated yet
My 1978 Mariner 115 with the CDI distributor ignition system will sometimes completely quit firing. When it is firing the spark will jump my 1/2" ignition …

Mercury classic 40hp 2 stroke c1989 Not rated yet
Hello,I have just rebuilt the hydraulics on the tilt assist ram and they work really well ,however I cannot get the gas accumulator to pressurise the system …

2004 Mercury optimax 225hp trim gauge  Not rated yet
My boat has analoge gauges. I have changed leg and it has a 3 wire digital trim sender. I have a short harness plugged into engine loom and other end is …

2016 75HP 4 stroke Mercury Not rated yet
Engine has approx 140 hours, it had full 100 hour service at about 80 hours. When it runs for an hour, it develops a miss. At wide open throttle it (mostly) …

2006 mercury 50 hp 2 cycle Not rated yet
Runs and starts great then after running 30 minutes running full throttle top cylinder shuts down and rpms drop from 5500 to 3000. Then i let it sit for …

Mercury 150 2015 Not rated yet
I have a 2015 Mercury 150 with an older 9.9 Mercury kicker added within the last two years. (When the problem started) Both motors run great on a full …

Mercury 60 4 stroke 2005 not big foot Not rated yet
Motor surges at idle and kills when you bring it back from higher speed. Starts right back up idles great for a few minutes than start surging shift into …

1999 mercury 9.9M two stroke  Not rated yet
I bought this motor used and love it. Recently started leaking oil. I pulled the prop and the shaft to replace the seals and realized that the prop shaft …

mark 25, year unknown Not rated yet
Parts manual shows needle bearings for center crank bearing. The version I have has plain bearing. Split shell like a car engine. Anyone know what other …

2001 Mercury 75hp elpt 4 stroke Not rated yet
Ran the motor one day and it ran great. Next day started just fine but as soon as got on lake and opened it up it acted like choke was on. RPM'S would …

Mercury 175 EFI 1989 Not rated yet
I'm experiencing a problem at idle both in neutral and in gear. The idle is rough and engine does not change when both center cylinder plug wires are removed …

Mercury 50hp 2 stroke 1980 Not rated yet
I haven't had boat out for few years due to heart problems but now want use it. Well start up great BUT the water pump impeller needs to be replaced as …

Mercury 50hp 2 stroke 1980 Not rated yet
I haven't had boat out for few years due to heart problems but now want use it. Well start up great BUT the water pump impeller needs to be replaced as …

mercury black max 1978 2 stroke 150 hp v6 Not rated yet
cold Engine cranks quickly but does not start. will start if using starting fluid. carbs rebuilt. new fuel,new squeeze ball, electric choke. new plugs …

Mercury Optimax 150hp 2007 Not rated yet
Starts fine. You can plane out an run for about a 1/4 of a mile an it drops back to a idle an sounds off 2 long beeps an the beeps stops. Motor doesn't …

Mercury, 115 Pro XS 2019 Not rated yet
When trying to achieve full speed with the engine at full trim out it will not hold its position. On the vessel view screen the full trim out is shown …

2005 60hp 2 stroke 3 cyl elpto Not rated yet
had to rebuild block which was no problem. When installing the oil injection pump there was an o-ring that looked deformed between pump and block so I …

1993 Mercury 200hp 2.5 2 stroke Not rated yet
Hi I’m Mark from Australia. I have a 1993 Mercury 200hp 2.5 that has just recently started sounding a constant alarm when turning the key. The motor …

Mercury Optimax 250 xs 2007 Not rated yet
Intermittent loss of power in rough water. Motor doesn’t stop but backs off on throttle and seems like I’m low on fuel. Motor runs great, no issues in …

2015 90HP Mercury 4 Stroke Not rated yet
I have replaced the starter as it was rusted and seized from some water damage. Motor turns by hand and starter engages and rotates when solenoid is jumped …

mercury 75 horsepower 4 stroke model number 1-f75412zd Not rated yet
my mercury motor has been with my mechanic for 12 months and he cannot resolve the problem. he tells me that the 4th cylinder is not firing but other than …

2009 50HP 4 stroke Mercury Not rated yet
Engine is receiving no electrical power from the battery to the engine. Tried using jumper leads direct from the battery and it turned over but did not …

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Mercury 135 v6 year 2000 Not rated yet
When I back off from a cruising speed say 3000 rpm the motor will just die. This seems to happen only after I've been running for 10 minutes or so. Once …

Mercury four stroke 150 EFI 2018 Not rated yet
During plane. suddenly the outboard went off (complitelly stopped) the Guardian System started producing a countinuos beep and on the display "SYS Fault" …

Mercury 2 stroke 115 Not rated yet
I have a 1962 16' Starcraft runabout that had a 1963 100hp Mercury 6cyl tower of power. My kids grew up with this boat and we wore that motor out. I have …

1983 mercury 200 2.4l Not rated yet
I’m replacing the headgaskets and have a factory manual for this engine and it states 40 ft lbs for head bolt torque and I bought new grade eight head …

200hp optimax Not rated yet
I took apart the trim pump the pistons that hold 2 bb's fell apart before I saw which way they go in upper part of pump, on the bottom section there is …

Mercury 4 stroke 75 hp 2007 Not rated yet
Hello everyone, about a month ago changed all fluids and impeller after noticing water wasn't pumping out piss hole and it was alarming out, got it all …

2012 mercury pro Xs 115  Not rated yet
After planning out and running for 5-10 min the motor losses power. I figured out if I let of the throttle a little it would keep it from shutting off …

2007 50 horse mercury  Not rated yet
After going across the water about half throttle it won’t idle back all the linkage working as it should

Mercury 6230292 70 hp 3 cyl 2 strk Not rated yet
I get it started in with power arm forward as soon as I try to pull it back to put it in gear it dies. Also cant start it in N

Mercury 40hp 1999 tiller handle Not rated yet
A good friend of mine let me borrow his boat with a 1999 Mercury 40hp tiller handle a few weeks ago and told me to run it because he barely runs it anymore. …

OD032083 Not rated yet
Mercury 150hp Jet V-6- intermittent RPM drop under acceleration- need WOT to get back on plane, power reduced to half. Fuel pump rebuilt. Possible switch …

Mercury 90 hp 2 stroke. 1998 Not rated yet
Engine runs fine up to 3/4 throttle at 4000 rpm. If you go past that it stars to bog down. When I remove the spark arrestor I can get it to run about 4500 …

Mercury 150xl 2002 Not rated yet
Upper engine mounting bolts - One is severely corroded(no shoulders, basically round. The other bolt head still has shoulders but is reduced in size(socket …

murcury 4 stroke EFI 2005 Not rated yet
The motor starts and will run at 5000 RPM for about 5 minutes and goes into limp mode and wont run any faster than 3ooo RPM. I have replaced all filters, …

Mercury 115HP Four-Stroke Not rated yet
I bought a new Tracker bout in 2017 with a 115hp Mercury four-stroke outboard. for medical reasons, I have never had the opportunity to start and run the …

Mercury Verado 135 2008 Not rated yet
Bought this boat and motor 2 weeks ago, first trip out the boat ran fine for the hour I had it out. Second trip I powered out to some fishing grounds, …

mercury 402 1977 Not rated yet
The engine will not shut off using the key switch. This was a used boat purchase, and the engine runs great, I can only shut the engine off using the choke …

2005 Mercury Optimax 2 stroke 150HP fuel injected Not rated yet
Was going about 30mph and the right engine rpms started falling. then it couldn't keep up with the other engine, not going past 2500 rpm's. Then it started …

Mercury 90hp EFI, 2012 Not rated yet
I have a 2012 Mercury 90hp EFI outboard. If it sits overnight I can start it and it will run fine for 15 to 20 minutes at any RPM. then it starts to shutter …

mercury 25 horse big foot 1999  Not rated yet
had over heat problem. replaced impeller and other misc, cooling parts. engine stars and idles perfectly. whwn cruising for only a couple hundred feet …

Mercury XR4 1990 model Not rated yet
I was getting my XR4 ready for a compression test. Hooked up the water, turned the engine over and it ran good. I put it in forward and suddenly it took …

Mercury, 115hp, 2004 Not rated yet
I had my family out on the lake a couple of weeks ago in our Triton, 188SF. We had been hanging out on the beach for couple hours and got really hungry, …

Mercury XR4 150 1988  Not rated yet
My motor seems to be a little down on power. It is missing when idling but not when I’m running anywhere over idle and when all this started the pee steam …

2006 Mercury 90 hp 4 Stroke Not rated yet
Ran great for 15 minutes even at full throttle. Then I started to troll and noticed a miss once in a while. Then stalled after a while. Would start right …

Mercury,25eh,efi , 2019 Not rated yet
Looking to buy new 25 hp outboard, have a 1986 9.9, love it , but i need to go bigger, 4 strokes are heavy, enuff said. does the new 25 have the old manuel …

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1115D73HY 1B804092 115ELPTO Not rated yet
With the boat in the water it runs and goes real smooth at idle. When I get just above idle it has a loud noise. It doesn't appear to be missing. When …

mercury 650 1965 Not rated yet
After installing a new water pump, water pump housing and replacing the two seals under the water pump housing water is not pumping with the same amount …

Mercruiser 350 inboard 1985 Not rated yet
Cannot get ignition to start boat. Has new ignition coil, getting gas, plugs good, carb rebuilt. will not cough even with starting fluid. help

Mercury, 2 stroke, V6 EFI, 240 HP, 2003 Not rated yet
Engine warning beeps and throttles down. Last code pulled from dealer was over-revving. They replaced a regulator module and said it was fixed. Same …

Tracker(mercury) 115 2stroke 2005 Not rated yet
The throttle arm backs off. Cannot maintain speed without holding the arm down.Can't find a way to put tension on the arm.

2003 Mercury 150 XR6 Not rated yet
I am purchasing from another state a boat that has a 2003 Mercury 150 XR6 engine. He states what he "thinks" the hours on the engine is. What I can't seem …

Mercury 150 2016 Not rated yet
Hi. I have a 2016 150 which is on a Nitro Sport. The limiter switch on the motor is acting up. will lift up but not down. a mercury mechanic showed me …

Mercury oil injected 60, 1987, #0B157444 Not rated yet
My son just bought a beautiful 1987 Bass Tracker w/ Mercury oil injected 60 outboard. The elderly gentleman who owned it is not mechanically inclined, …

2005 Mercury 40hp ELTPO 2 stroke Not rated yet
2005 40 hp ELPTO 2 stroke mercury runs fine for the first 10 minutes then suddenly starts revving/whailing very high and clunks when shifting gear back …

1991 Mercury 115 2 stroke Not rated yet
I'm having an issue with my warning alarm, at first i would get the one beep when the key was turned on letting me know the system was working correctly …

2005 four stroke 60 horse Bigfoot Not rated yet
2005 four stroke 60 horse Bigfoot I was going across the lake wide open at 6000 RPM and then all of a sudden it went to 4500 PMs The engine sound and …

1998 Mercury 40/30 jet Not rated yet
Since late last fall my motor has been giving me fits. After start up I let it idle for a short time. I then engage the throttle and power up. When I hit …

Mercury, 60 ELPT BF 2010 Not rated yet
Nothing works (no power) after winter storage. Battery is fully charged, all connections are OK. Almost seems like a fuse. Are there any other fuses …

Mercury, 50hp, 2005 Not rated yet
Engine starts great. Idles great. When given full throttle it takes off great but in a few minutes it starts to slow down. If I keep the rpm's around 3500 …

88 70hp mercury  Not rated yet
My boat was running great about a month ago and now it barely wants to start and when i do get it started it just cuts off, i had it going when i rev it …

1998 Mercury 115 offshore  Not rated yet
Hello , i am Wondering if anyone could give me a name for this part . I have Searched and searched but can not seem to find name of this part thanks in …

2001 Mercury 15 Hp 4 stroke outboard pull start  Not rated yet
My engine runs good and revs up fine in neutral but once put into forward it bogs down and will not run faster than bout 35% at full throttle what is the …

Mercury 115 1982 Not rated yet
1982 Merc 115 tower of power making ticking noise at low rpm. Tick increases with speed up to 1000rpm then goes away. Happens consistently whether in forward, …

1998 mercury 150 efi Not rated yet
turn key all I get is a few beeps, no crank. tested battery shows 12.8 volts. is there some troubleshooting guide or outline you can direct me to. I'm …

Mercury 175xr2 1999 Not rated yet
Starts and idles fine then starts surging when I give some throttle (weeeooo weeeooo weeeooo). Wont reach full power I guess it's probably electrical, …

Mercury 175xr2 1999 Not rated yet
Starts and idles fine then starts surging when I give some throttle (weeeooo weeeooo weeeooo). Wont reach full power I guess it's probably electrical, …

1998 Mercury 215hp saltwater  Not rated yet
My tech told me that the magnet on my flywheel is broken up. How much is a flywheel? Should I get a new or used one?

2003 mercury 150 XL 2 stroke Not rated yet
will not shift into or out of gear sometimes Cable all seem to be moving corrcly

2019 Mercury 60 ELPT EFI 4S Not rated yet
The leg splashes water into the boat. The boat is a Princecraft Amarok DL WS Anyone sitting in the jump seats are guaranteed to get wet.

mercury 150 L DP 1999 Not rated yet
I removed the lower unit to replace the impeller. I cannot align the driveshaft spline with the crankshaft. I have tried rocking the engine and turning …

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Twin Mercruiser 7.4 Engines engines will not start Not rated yet
Twin Mercruiser 7.4 Engines will not start after running perfect for an hour

Mercury 75hp model# 1075412AD year 2002 Not rated yet
The motor will not get up over 3000 RPM under load. However, it will in neutral and in gear in reverse

2012 Mercury 9.9 pro kicker Not rated yet
Trolling out in lake Erie and alarm beeps start in when running kicker motor. Water pump new and running great. Oil level new and full. Not sure why beeping …

MERCURY ELPT 115 CT 4 S Outboard doesn’t even turn over Not rated yet
I go to start my MERCURY ELPT 115 CT 4 S motor and i get nothing but clicks!!! Batteries (2) are good, it’s in neutral and my safety run switch is on …

2008 mercury 200 optimax  Not rated yet
Keeps blowing same cylinder this is the 3rd time motor has less than 60 total running hrs

Mercury 60hp motor trouble Not rated yet
I have a 2013 bass tracker Mercury 4 stroke motor only has about 15hrs on it. I dont know the proper maintenance on it so I took it just one time to where …

92 Mercury 2.5 efi,200 hp Cylinder filling with gas Not rated yet
I have a 92 mercury 2.5 efi,200 hp. The bottom cylinder is filling with gas. If you remove the plug and roll it over it sprays out gas, then put the plug …

Mercruiser 3.0 Alpha One turns over but won't start  Not rated yet
I just acquired a 1994 Bayliner Capri 1750 with a Mercruiser 3.o Alpha One that had been sitting for three months from a buddy. Got it home and noticed …

50hp mercury 500 thunderbolt Prop requirement Not rated yet
I have a 1980 alumicraft classic deluxe 16.3 ft 570lb with a 50hp mercury 500 thunderbolt and I don't know what prop I need to get. I have been told many …

1998 90hp Mercury Prop spins in neutral  Not rated yet
I recently serviced my lower unit including water pump on my 1998 90hp merc. When I went to put it back on couldn’t get the boat in reverse took it back …

5hp Mercury What is the Yellow sticker  Not rated yet
I’ve got a 5 hp Mercury outboard that has a yellow sticker with a water droplet with two arrows pointing to the water droplet does anyone know what this …

1977 1150 Mercury in line 6 Not rated yet
Motor started and ran fine all last year. Was starting and running fine when winterized in October, 2018. Got it out to go fishing yesterday. Cranks …

90 hp Mercury 4 stroke idle and stalls. Not rated yet
I have a 90 four stroke Mercury 2001. Have a issue with poor idle and stalls. It runs great after take off. But poor idle and motor skake. I have had …

1998 mercury 200hp No gauges Engine in Limp Mode Not rated yet
1998 mercury outboard 200hp. Just bought the boat as is for cheap. Previous owner got her up on plane, lost all gauges and at the same time engine went …

1976 mercury 1150  Not rated yet
I have a 1976 mercury 1150 outboard I have replaced all fuel lines gone through carbs linked and sync starts right up idles great when out on water and …

2013 2 stroke dfi 225hp Mercury Optimax died.  Not rated yet
I was fishing offshore the other day and added oil to my 2013 225hp oil injected mercury optimax that is a dfi model. Covered approx. 100nm and decided …

4.3 Mercury Strange engine stopping Not rated yet
I have a 1989 celebrity 181 equipped with a 4.3 mercury and a mercury out five. My problem is it has suddenly deteriorated eloped problem of suddenly …

2005 mercury 125 outboard Motor starting issues Not rated yet
I had just replaced solenoid and starter on my 2005 mercury 125 outboard. I had taken it out twice before and no problems. On my third trip, I noticed …

Mercruiser tilt and trim electrical problems Not rated yet
I have no power tilt and trim , two wires burnt and do not know what they connected to on the transom coming from the pump and I cant find what they were …

7.4L Mercruiser 1991 Sea Ray 250 Not rated yet
I left it sitting for the winter and I've got no power to any of the gauges, lights, etc. Will not turn over. I took both batteries to be charged and they …

2015 90hp Mercury throttle & shift cable replacement Not rated yet
trying to replace throttle and shift cable on a 2015 90hp Mercury outboard engine, shift cable is a problem getting to. Does the rest of wires & hoses …

7.4 mercruiser lx mpi mercruiser surges at about 1200 rpm Not rated yet
I have a mercruiser 7.4 lx mpi with a bravo 2 sterndrive.At about 1200 rpm just off idle it surges.I have replaced the throttle position sensor and it …

Mercury 135L Opti won’t go into any gear Not rated yet
Hello. We have a Mercury 135L Opti motor & just went out fishing for the first time this summer. We got it in the water and it won’t shift into forward …

4.3 Mercruiser Starting problem on Bayliner Not rated yet
I just had a starter professionally installed last fall on my 2005 Bayliner 195 with 4.3 Mercruiser. I started and ran it at home using water and it ran …

350 mercury crusader Carburettor not getting fuel in  Not rated yet
I changed the fuel pump and the fuel filters and I still cannot get gas to come through the lines. I am wondering if the cannister filter is clogged. …

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75hp Mercury outboardTrim issues Not rated yet
When I'm at idle on my 75hp Mercury outboard I hit the trim up on my throttle the boat motor will die and an alarm will sound. When I'm under power and …

Mercury 25 hp1985 Not rated yet
Ok fellas i have a 25hr merc and i just got it out of the boat shop today oh its a 85 model and i just replaced every single electrical part on it for …

5.0 Mercrusier stalls during takeoff? Not rated yet
I purchased a 2006 Crownline 220 EX with a 5.0 Mercruiser with an Alpha 3 drive. Had it out 3 times the first week with no problems. Took it out today …

115 Mercury Verado on Pontoon Boat - Low Thrust Not rated yet
We have a 22 ft pontoon boat with a 115 mercury verado. It has a 21 1/2 inch prop with. 15 pitch. The prop seems to be overreving and the boat is slow. …

Mercury mirage 175 hp  Not rated yet
I have a 2004 mercury Mirage 175HP 6 cylinder 2 stoke Boat starts and idles with hose hooked up to outboard you can give it full throttle runs and sounds …

91 Mercury 15hp problems Not rated yet
I bouaght a 1991 15hp Mercury outboard ran great first 15 times out then one day it would not start at all. After going over the motor I found a ground …

2001 Mercury 60 hp 2 stroke jet  Not rated yet
Motor was running fine got hot fixed overheating problem compression 120 on all three cylinders boat will not get wide open throttle bogs spits and sputters …

2003 Mercury 115 2 stroke Not rated yet
I was running wide open i slowed abit hit another boats wake hit hard nothing out of the ordinary than the motor bogged down barely would stay on a plane …

Mercury Mariner 115 - Killswitch location 1990 ozark Not rated yet
I’m trying to figure out what’s wrong with my boat. I either burned up the starter/solenoid or there is a killswitch and I don’t know where it is. I have …

60hp Mercury motor feels like its dragging Not rated yet
When i go full throttle, for about 2 minutes, it feels like my motor is dragging. Won't get to full speed, then all of a sudden, without really doing anything, …

79 mercury 402 40 hp stuck in neutral  Not rated yet
Same boat that would not shut down. I fixed with a kill switch. This a 79 bass Tracker. I was checking circuits when the engine started to smoke? It was …

Mercury Optimax 200hp Problems Not rated yet
I just had my lower unit replaced but now I’m noticing an issue where the engine at low throttle , you can hear it occasionally lose power or not purr …

60hp Mercury 4 stroke 2013 High pitched squeals Not rated yet
I get a high pitched squealing sound when I turn on the motor on my 20 foot Sunchaser pontoon. Motor is a 60hp Mercury 4 stroke 2013 model. Has run and …

2006 60 hp Mercury efi bigfoot 4 stroke Not rated yet
Boat runs great as long as your going. Once you shut down and anchor for awhile, will crank but never fire. Was told that there is a diode that is probably …

85 Mercury 35hp trim gauge install Not rated yet
Looking to install a trim gauge on an 87 procraft 1510 bass boat with an 85 mercury 35hp 2 stroke. Does this motor have a trim sender? Where would it be? …

Mercury Optimax 200 dies Not rated yet
Hey there my optimax 200 keeps dyeing when I’m boating it’s like someone hits the kill switch. I put fresh gas and I eliminated the inline fuel filter …

79 mercury 402 40 hp will not shut down? Not rated yet
I have a 1979 16' bass tracker, i am restoring. I have the engine work done. It runs fine now! However, it will not shutdown with the key switch? I have …

115 Mercury 4 stroke Not rated yet
I have a brand new Mako Pro Skiff with a 115 Mercury 4 stroke, I accidentally left the battery switch in the on position, for like 2 days. Today I noticed …

Mercruiser 350 mpi petrol motor starting problem Not rated yet
I have a 1990 bayliner 3255 avanti sunbridge cruiser with 2x mercruiser 350 mpi petrol motors. My problem is that the starboard motor won't start without …

225hp 2002 Mercury Optimax circuit breaker location?  Not rated yet
I am having massive problems troubleshooting my twin 2002 225hp optimax motors ,both motors are running well ,but I had both trim motors working well ,then …

Mercury 60hp 3 cylinder late 80s Not rated yet
Hello I have a late 80s mercury 60hp 3 cylinder I bough it recently it run perfect the problem is the gay who I dot it from took all the wiring of the …

Mercury 40hp 2 stroke oil injection Not rated yet
Hi, I just bought this engine, compression is good on all 4 cylinders, the boat is really hard to start and it will only start with fast idle lever up …

2012 Mercury 150 4-stroke fuel pressure problems Not rated yet
spring 2016 start up motor started perfect, idled perfect but choked and coughed at any thing over 2000rpm. Dealer replaced the fuel pressure regulator. …

Maxxum 5.7L Mercruiser Very High rev at "idle" Not rated yet
I replaced the linkage on the throttle body (the old one broke last fall, and I had to make a new one as they are out of production) and now when I start …

Mercury 90hp throttle won’t stay in position  Not rated yet
I have a 2015 Cypress Cay Seabreeze with a Mercury 90hp four stroke. When cruising around at half throttle, the lever stays put and I can let it go, …

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2001 Merc 200 Optimax, 2001 Lund 1950 Tyee Not rated yet
With the Master Power on, the 20amp fuse on the engine block will blow intermittently when the engine is running. It only blows when the engine is running …

2010 Mercury 9.9 4 stroke blowing smoke  Not rated yet
Last sunday went out to my local lake early in the morning, 6:30 to be exact, i let my motor warm up like i always do, no smoke, started out from the boat …

Mercury Optimal 115 Boat motor not starting Not rated yet
So I have a nitro x5 2010 with mercury optimal 115 on it. Recently I’ve been on the water and motor would not start. I turn key and it beeps like normal …

Mercury 225 HP-Hard to start Not rated yet
I have a 2004 Merc 225 that takes forever to start. I usually have to take the cowl off and use the manual choke. does anyone know what the problem might …

2002 Mercruiser 6.2 temp fluctuates Not rated yet
Hi, I have a 2002 31’ doral and my temp fluctuates from 120 (the lowest temp), to 165, then maybe 120, then to 170’s, then drops to maybe 130, and keeps …

Mercury 115 hp Not rated yet
I have a 2016 Mercury CT 115 hp engine in a 21’ pontoon. It continues to run hot and cavitate at full throttle. When I back the speed down 5 mph there …

1993 Mercruiser 4.3L, hard start when warm Not rated yet
My 1993 Bayliner 2250, with a 4.3L mercruiser, electronic ignition ,2 barrel carb. will start up quick when cold. However after making a run to a fishing …

Mercury 115hp elpto '95-'96? chatters on deceleration/shutdown Not rated yet
have 115 2-stroke(has 2-4 system)idles on top 2 cylinders/ above 1800rmps runs on 4 cylinders, anyway- when shutting down engine after running fast or …

Mercury Pro xs 250 year 2016 - Solenoid overheating when charging batteries Not rated yet
So I haven't put my boat in the water in a couple months. Pulled off cover and did some inspections to the batteries for corrosion on wires and terminals …

Need help with mercruiser 170 4 cyl Not rated yet
I'm getting spark at all cylinders but boat won't start boat was running and seemed to be getting harder to start each trip I'm new to boats so I was clueless …

260 Mercruiser has no power running rough blowing smoke Not rated yet
I'm having a problem with my 260 mercruiser. It wont rev up, has no power and blows smoke. Out of the water it runs fine. I put it in the water and its …

2017 Mercury 60 HP, how To disconnect? Not rated yet
Hello and thank you. I have sold my 2017 Merc 4 stroke and need to disconnect from the transom and have it hoisted into my pick-up so I can deliver it …

1967 mercury 350 outboard charging system Not rated yet
Motor starts and runs decent after recent purchase. rebuilt carb and fuel pump and now not sure how to make sure the engine is charging my battery before …

mercruiser 5.0 alarm only over 2K rpm's Not rated yet
I have a 2005 Chaparral sunesta 236 with a 5.0 mpi and a bravo 3 outdrive. It recently started throwing an alarm (2 beeps every minute) when I go over …

Mercury 50 hp outboard acceleration problem. Not rated yet
My pontoon hasn't been run much in the past 2 years. It would not start and we felt it was a fuel problem. We rebuilt the fuel pump and replaced the fuel …

Mercruiser 4.3 XL Alpha One stern drive will not raise Not rated yet
Hey everyone, I have a 1997 Maxum 1900 SR with a Mercruiser 4.3 XL Alpha One I/O. Lately, my trailering button and my up button on my remote control is …

Hour meter on 1992 Mercury XR4 BlackMax 150? Not rated yet
I recently purchased a 93 19' Rajin Cajun with a 92 Mercury XR4 BlackMax 150. I bought it from the original owner. I would like to know how many hours …

2006 350 MerCruiser Manifolds seem to be too hot Not rated yet
I was told that you should be able to put your hand on both manifold while the boat is been running for a while and be able to leave your hand on them? …

Mercury outboard 2 cylinder 4 stroke Not rated yet
I am trying to help a niece with a outboard engine problem. The motor belongs to her school's rowing team. There is a red light on the handle near the …

1999 Mercury EFI 150 Clunking Not rated yet
I have a 1999 Mercury EFI 150. My problem is when Im cruising at any speed the motor feels like it his hitting something, a clunk will happen and the the …

1989 Mercury Black Max Engine Power Issues Not rated yet
Engine has been running good and all fuel filters have been changed recently. The other morning heading out of the marina I was idling out. Leaving the …

Mercruiser 5.0 MPI Need to prime?  Not rated yet
I have 2 engines and seems like my port side engine always have problem on over heating if it hits 180 degree. Recently I have changed the engine oil …

1995 Mercury Exar  Not rated yet
I have a 1995 mercury XR I 150 that I took out on the lake and noticed it would bogg down when I was trying to give it throttle several times and never …

150 HP Mercury outboard Several gauges quit reading Not rated yet
I have a 150 HP Merc outboard on a 20 ft runabout. Everything worked perfect until I had a power steering cable put in. Now the in dash fuel, speedometer, …

2002 mercury 2 stroke will not turn over Not rated yet
This is the first problem I have had with this boat (2002 Triton TR176) since buying in 2008. Don't use it often so had to replace starter battery and …

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79 marlin 165 hp mercruiser Not rated yet
Working on 1979 165 hp mercruiser I/0 Was cruising across the sf bay and boat made a pop like it came out of gear and i lost drive to fwd and rev and …

Electrical no power mercury 9.9 Not rated yet
2000 mercury 9.9 Bigfoot sun tracker pontoon-my 20 amp fuse keeps blowing in motor..no power to start , gas gauge doesn't move and red oil pressure light …

Mercruiser 3.0 running fine and dies... then no power Not rated yet
We have a little 18' SeaRay with a Mercruiser 3.0 that just did something very unusual. This was our first time out for the season. Started fine and …

2011 Optimax 150 SN 1B839153 Not rated yet
Last year motor starting throwing low voltage codes and put itself into guardian mode but would work fine after shutting it down and waiting about 5 minutes. …

2015 mercury 115 HP Not rated yet
I installed another battery and I arked the cables and lost all power to motor, the safety kill switch is making a beeping noise cant seem to find anything, …

150 mercury 2.5L XRI outboard motor Not rated yet
Was on the lake running my 150Mercury 2.5L XRI outboard on my 1993 champion bass boat when it just died and fell on its face. Tried to start it back and …

60hp Mercury 4 stroke splutters when accelerating Not rated yet
I have a 2005 60hp Mercury EFI 4 stroke, and sits on a 4.85mtr Stacer. So far its been reliable, quiet and economical (done 180hrs) but its just started …

Mercury 25hp 4stroke cranking issue Not rated yet
I have a 2009 mercury 25hp 4 stroke EFI. It has been sitting for about two years with no fuel in the system. Now it will not turn over. The flywheel …

1979 mercury 140 HP cold starting issues  Not rated yet
I have a 1979 mercury 140 HP outboard that is very hard starting when cold. Seems to be a fuel issue. When starting for the first time of the day or after …

2002 mercury 60 hp 2 cycle no power to tilt and motor Not rated yet
Hi everyone. 2002 mercury 60 hp 2 cycle no power to tilt and motor motor won't crank but the choke button on starter key still clicks. I am getting 12.64 …

Mercury 850  Not rated yet
I have a 1976 model mercury 850 85 hp outboard its been stored for years has great compression but you could see where someone had patched in some replacement …

2005 mercury 115 4 stroke leaking oil  Not rated yet
I have a 2005 mercury 115 4 stroke that leaked a small amount of oil down the lower end cases. the oil level is 1/2 qt low. can anyone tell me where the …

Mercury outboard motor will not start Not rated yet
I have a 2006 mercury 60hp bigfoot 4 stroke efi that will not start. Went fishing today and the motor started fine, and ran great. Turned it off to fish …

1999 Mercury 125 hp 2cyc 4 cyl outboard problems Not rated yet
Starts but will not stay running. Changed all gas components, stator, trigger, plugs, choke actuator...it seems one plug does Not get hot and has no wear. …

1983 Mercruiser 260 bogs after running 15 mins from 3200 rpm to 2000 rpm? Not rated yet
I am a Finlander here in beautiful Wisconsin! Bought an older Carver Santa Cruz 26 (1983) and restored it with care to it's original beauty! I love the …

140 Mercruiser dies when tilt down in lake Not rated yet
So I bought my first boat and well after cleaning the carb well and adjusting the idle I got the boat to run great while on muffs. I took it out the other …

1996 merc 9.9 4 stroke with no choke issues  Not rated yet
hi there, i have an older merc that on a recent trip started no problem first pull it would run all day for a couple of days then next morning nothing …

3.0 mercruiser won't throttle up past 2000 rpm Not rated yet
I have a 1987 ebbtide with a 3.0 mercruiser I have replaced valves rocker arms cam shaft rebuilt carb plugs wires points condenser cap rotor button …

1977 Mercury 150hp Tower of Power bogs under load Not rated yet
Over the winter I rebuilt the fuel pump cleaned carbs paying very close attention to mixture screw locations, replaced fuel tank and fuel lines also replaced …

Mercury classic fifty outboard stalling Not rated yet
I recently received a 1988 Bayliner Bass with what I believe is the original Mercury "Classic Fifty" 45hp outboard. I was told by the previous owner that …

1985 mercury 75 hp 4 cylinder  Not rated yet
Not sucking gas through lower carb at idle like the top carb does. Need help I'm just curious if this is normal as I just got the boat and after tuning …

2006 mercury optimax 115 2 stroke alarm problems @ 4100 RPMs Not rated yet
I have a 2006 Mercury Optimax 115 2 stroke on a 2006 Triton Tr176 which everytime I run it I get an alarm at 4100 rpms.I can sometime run through it,with …

2000 Mercury efi 200 Not rated yet
I charged my batteries for a dry test the other day and both motors turned fine took for sea trial and right engine shut down as soon as I have throttle …

1984 Mercury 115 hp power trim & tilt problems  Not rated yet
I have a 1984 Mercury 115 hp outboard. it was a little low on fluid. After adding fluid it worked ok a little temperamental at switch but it worked. This …

200hp mercury optimax 2007 Not rated yet
I was going down the lake and my mercury 200hp started losing power and then it made a noise and it wouldn't crank back up and there was no beeping warnings …

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mercruiser 120 low rpm's at wot Not rated yet
I have a 18ft galaxy with mercruiser 120 I/O. boat revs great (4000-5000 rpm's)but only getting 2200 rpm's in gear at wot. currently has 23 pitch prop …

Mecury 200 hp raises up in reverse Not rated yet
Everything works fine, but if i give it power in reverse,ing. On the water, everything appears to work f the motor raises up. Also, when i use my transom …

Mercury 4 stroke 150 HP keeps going into gaurd mode Not rated yet
My Mercury is a 2013 model and my workers ran 2 stroke fuel for a day then I changed it, it ran fine for a couple of days then in idle it overheated and …

Mercury 200 HP 2 stroke issues Not rated yet
I have a 1996 Merc 2 stroke that is having some issues. The motor starts regularly but when I put the throttle down it just seems like the motor is bogged …

Mercury 35HP outboard motor cooling Not rated yet
I have an older model 35HP Mercury Outboard motor. Did not use it all year due to health problems. Started it today, 9/27/15, to get it ready for winter …

1987 mercury 45hp classic 50  Not rated yet
1987 mercury classic 50 has no spark. I went out one day and it worked fine then the last time I went out and wouldn't fire up at all. There is no spark …

2007 Mercury 4 Stroke 115 Dropped from 6000 rpm to 5000 Not rated yet
While driving my 24ft Bentley pontoon boat, all of a sudden my max rpm and max speed dropped. I was getting around 6200 Rpm at 27 mph. Now it won't get …

1990 350 Mercruiser barely starts intermittantly Not rated yet
I have a 1990 Bayliner with a 350 and a QuadraJet Carb. It runs great at times, but at other times I cant even get it off the trailer. I have learned …

Mercury 75 hp Not rated yet
I got Mercury 75 1990s alarm started beeeeeeeeeep soon as I turn key wivout starting it but it keep beeping constantly until I turn key back a bit is this …

mercury 3cyl 60 hp will not turn off. Not rated yet
I just change the starter , voltage regulator, Igintion switch & solenod. Motor ran like a kitten. I ran it for five minuties than I went to turn it off …

Have a 1981 Mercury 70hp bogs at full throttle ,  Not rated yet
So I took my boat out for its second outting this year , the first time outting we were on the water for 4 hours motor worked awesome , second outting …

2003 Mercury EFI 250 HP Not rated yet
Hi recently purchased boat went out eran fine Next time out drove 20 min than idled for 20 went to take off no power trimmd motor up to check if any thing …

Mercury Optimax 135 Not rated yet
I have a 2000 Mercury Optimax 135 hp with only 50 hours on the motor. The motor idles great, but when I advance the throttle in accelerates for about …

79 mercury 85hp shifting problems Not rated yet
I changed the water pump impeller , I am having a lot of trouble getting the shifter splines aligned so the shifter works properly. I have spent hours …

Ticking noise on 2002 Optimax Not rated yet
Was going about 4500 rpm and all of a sudden my 2002 150 hp Optimax starting makinf a loud ticking noise. Didnt seem to lose power but of course I slowed …

1983 80hp Mercury  Not rated yet
I have a newly rebuilt motor and I just rebuilt the deck, replaced carpet, and other items on the boat including the throttle and cables. The boat ran …

75 HP Mercury - Oil alarm Not rated yet
We have a 2003 75 horse merecury outboard it has plenty of oil when we go real slow our oil alarm comes on when we go fast is goes off what could be wrong? …

85 Merc 150 XR2 oil alarm after first starting Not rated yet
Turn the key on, alarm chirps as it should. Recently though, after starting, the beep beep oil alarm continues. Checked both oil tanks, and the remote …

76 merc 900 runs rough Not rated yet
I have a 90 hp merc 1976. was running great for several days and then would beging to run very rough at all trottle positions (even idle). Starts fine, …

1996 Merc 60 hp  Not rated yet
1996 60hp outboard starts and runs great, won't re start . We just purchased a used pontoon boat. It has a 1996 Merc 60 hp. The thing starts first attempt. …

2004 Mercury 25 HP 2 stroke only runs on one cylinder  Not rated yet
My 2004 Mercury 25 HP engine only runs only on one cylinder. The bottom cylinder works fine and the engine will run with only the bottom firing. If I …

3.0 mercruiser Not rated yet
The engine will start, idol and run through all the rpms but when it's in the water under load it will not power up and run above 10 mph. It will not …

mercury 120 1994 Not rated yet
Well it started about a 3 months ago and I havnt ran it sense then. It will not start I think I may have mixed my fuel to rich I emptied my tanks got new …

mercury 60hp outboard 1983 - Fuel choking off after 10 mins Not rated yet
I have a mercury 60hp outboard 1983 motor. I recently had the mid-casing replaced because it was cracked. The motor is running very well but after approx. …

75 Mercury Black Max bogs down Not rated yet
The motor runs great out of the gate for about half an hour then when I go to throttle down it boggs down, you can tell that it really wants to run when …

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94 150hp 2stroke mercury outboard trouble starting when warm Not rated yet
Starting my engine is super easy but when I run it for a while and turn it off and wait about a half hour and go to restart, it will start but it takes …

1974 Mercury 500 5o hp wiring Not rated yet
I was having a problem with my boat that when I turned the key it would turn but not start, and I was not getting spark from the plugs, so I ask someone …

Mercruiser 175 I/O Hard Steering Not rated yet
I have a 1988 Blue Water 18 Ft Eagle Runabout with a Mercruiser 175 I/O and the steering has become hard, not locked up but difficult. I've checked the …

2003 Mercury 75 HP no reverse Not rated yet
I have an 2003 Mercury 75 HP 3 cylinder outboard, I dropped the lower unit to change the water pump impeller, reassembled everything, but now have no …

1983 merc 70hp Not rated yet
Just bought this boat had to change shift cable and do minor maintenance but can't get the I guess you call it the neutral rev button to work I push it …

Mercury 200 rapid deceleration Not rated yet
I have a mercury 200 that accelerates great but on throttling back hits a point where it decelerates rapidly (30 miles per hour to 10) in the space of …

1988 Pro 17 Mercury 40 HP Not rated yet
I acquire a 1988 Pro 17 Mercury 40 HP I never own a boat . My first question is how do i go about starting the engine up. Do I need to mix a certain part …

Mercury 40hp battling to start and dies Not rated yet
I have a 2005 40 hp Mercury 2 stroke 3 cylinder. I am battling to get it started. Eventually after opening the throttle and about a hundred pulls it fires. …

1989 mercury 115 outboard trim issue Not rated yet
My old trim motor on my boat recently went out, so I replaced it with a new motor and pump. The new trim motor works properly but for some reason when …

1980 40hp mercury boggs down when put into gear Not rated yet
My brother bought a 1980 40HP Mercury for his boat. It idled a bit shaky when he first bought it so he put fresh gas, cleaned car and I believe adjusted …

1993 murcury tracker 40hp is sick Not rated yet
I have a 1993 murcury tracker that wont stay running unless I continue to press the choke. This was all of a sudden thing. If I do get it running and …

Mercury 40hp 402 Not rated yet
Hi all i have a 1982 40 hp 402 mercury.Took it out a couple of weeks ago and it broke down.. Not sure what the problem is..Has plenty of spark/fuel and …

1982 40hp 402 Mercury Not rated yet
Hey all took my boat out couple of weeks ago And it broke down....Cruising along at about 10knots it just died. And would not restart.call vmr get towed …

Mercury 60 EFI 2004. Motor over rev alarm Not rated yet
The above outboard EP system puts the motor into limp mode when engine revs get up to around 3,000 revs. This only happens when the boat is in the water …

Mercury stop running and wont start Not rated yet
Ran my outboard merc for a few hours in rough conditions. When I got pack too the dock the motor died and noe it whont start. I checked the fuel for water …

200hp mercury runs but not charging batteries Not rated yet
2004 Mercury starts and runs but sputters and backfires under load. Also it is not charging batteries. It acts like it doesn't have enough spark. I don't …

Mercury 90 FourStroke EFI intermittent loss of power  Not rated yet
I have a 2008 Mercury 90 EFI on my 170 Montauk. 4 times in the past two weeks the engine loses all power but within the first 5-10 minutes but still stays …

2008 Mercury 90 EFI intermittent loss of power Not rated yet
I have a 2008 Mercury 90 EFI on my 170 Montauk. 4 times in the past two weeks when running at different speeds it feels as though the engine loses all …

1996 mercury outboard 125 2 stroke power problems Not rated yet
I have a searay boat with a 125 mercury 2 stroke.it has sat for 10 years being started once a year or so to make sure she ran. It runs flawlessly, starts …

Mercury 35 - loss in primer bulb Not rated yet
Hello I have a 1980’s mercury 35 I prime the bulb and starts right up idles well then it stalls I can keep priming the bulb and it will run fine and in …

mercruiser 120 i/o random stall and skip Not rated yet
i have an 83 mercruiser 120 i/o that will start up and run mint for about an hour or more after trolling then motor will quit and sometimes start up hard …

Old mercury 175 io  Not rated yet
It's a 1984 Mercury IO. Strong motor when she's going. 50% of the times I will run her on the water for 45 minutes and shut off in the water...when I try …

2005 Mercruiser 5.7 noise Not rated yet
My 2005 Mercruiser 5.7 makes a rattling come clacking noise until it gets warmed up. Change the exhaust flappers but no change. Not sure if its connected …

1983 mercury 35 hp  Not rated yet
I have 1983 mercury outboard 35hp, in idle speed will push the boat, but as soon i put it in full throttle it just rev up the motor and would not pushes …

2002 50 hp mercury runs slow but dies when trying to accelarate Not rated yet
have a 2002 50 hp mercury outboard. Always has been hard to start and to keep idleing. once i do manage to get it into gear i can only go at a slow speed. …

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2001 Mercury 150 XR6.  Not rated yet
I own a Stratos 264 with a 2001 Mercury 150 XR6. Every time I try to come out of the hole the RPM's spike to around 5900 RPM's. Is it blowing out of the …

1989 mercury 200 Not rated yet
I am having trouble with my mercury engine, when I start out the engine runs great I have ran it up to 2hrs without a problem. Then when I stop to fish …

Firing problems on 25hp Mercury two stroke Not rated yet
The motor wasn't idling properly, it would rev up in the neutral position and run high when in forward accelerated position. I was waiting to put boat …

Mercruiser 5.7 V8 petrol 260hp Not rated yet
My fresh water header tank loses about one litre of water after each trip. What could be the problem? The motor runs at the correct temperature and does …

1995 Mercury 115 HP Fuel Primer Bulb Not rated yet
The primer bulb on the 1995 Mercury outboard was replaced last year with the standard Mercury primer bulb. Usually the night before I go fishing, I pump …

2007 Tracker Tunda - 200 Mercury Optimax Voltage Issue Not rated yet
I recently swapped batteries on my boat and am now having issues with the voltage meter gauge stuck up around 15V even with the power disconnected. When …

Mercury 1989 50 hp 3 Cylinder Blows Switch box Not rated yet
Bought a 1989 boat ran great for a year. Blew the switch box, it also had a melted rectifyer. I ordered and replaced the Stator, trigger, Switch box, rectifyer …

Mercruiser 305 Engine cuts out Not rated yet
Mercruiser 305 cuts out at 3500 rpm, when throttle pulled back engine returnes to normal. Changed fuel pump, new carb kit, swapped all electronics with …

4.3 mercruiser won't start Not rated yet
My inboard/outboard 4.3 mercruiser works intermittently. Starts sometimes other times it clicks and won't start. Is this a starter issue? or something …

2001 Mercruiser 3.0L lost half the electrical systems Not rated yet
Boat was running just fine, tried to start it after a week away from the lake and it cranks but does not turn over. Then noticed no movement from the …

2001 4.3 mercruiser will not turn over Not rated yet
I have replaced the battery and gone through all visiable fuses and they look good. The horn, blower, and bilge all work. The instrument panel does not …

mercruiser 4.3 stalls after shifting to forward Not rated yet
i have an inboard mercruiser 4.3 lx i have no problem turning on the engine and increasing the rpm in neutral, but when i put the boat in the water and …

2007 mercury optimax 90 hp will not go in reverse Not rated yet
I bought my 2007 mercury optimax 90 new in 2007. Warranty is expired and it recently got very difficult to shift to reverse. I took apart the control …

1999 9.9 mercury 2 stroke has weak spark Not rated yet
first the motor i just bought had bad fuel pump,replaced that. now it has a weak spark. replaced plugs and wires plugs fire is very weak tested stator …

Winterize an OMC 120 hp Mercury  Not rated yet
How do I winterize a omc 120 hp Mercury with outdrive. New to boating and would like useful info on storing boat for winter and any maint. tips would …

Mercruiser tachometer Not rated yet
tach frequently "buries" itself or shows rpm far above actual engine speed. returns to correct reading after hitting a wave or a change in the trim - usually …

1999 7.4L Mercruiser with Vapor Lock problem Not rated yet
Hello, I have a 1999 Chapparal with a 7.4L MPI engine. My engine has only 135 hrs since I do not feel compfortable taking the boat out very often. When …

2001 yr. 225 mercury optimax 2 stroke motor Not rated yet
i posted an article about hard to get on plane with a tr 21 triton and this motor also additional comments i forgot about at the time is when i load this …

Mercruiser 4.3L  Not rated yet
I just bought a Bayliner with the mercruiser engine. Last week I wanted to try it and went to a lake but it did not have any force and did not speed at …

470 mercruiser trim cylinder hook-up Not rated yet
I have a 1982 Larson w the 470 mercruiser and I purchased a set of trim cylinder that have the connectors at the bottom of the cylinder and do not know …

Mercury 115hp 1998 Saltwater 2 stroke 4 cylinder Not rated yet
Motor wont go over 4000rpm 25 mph on flat water . every now and again surges up to 5500 for a few seconds.reduce acceleration manually then increase same …

4 cylinder I/O Mercruiser 1987 Sea Ray Seville Shift Problems Not rated yet
I have a 1987 Sea Ray Seville with a 4 cylinder I/O Mervruiser. When I put in the water for the season a few weeks ago, all seemed okay. A couple of …

5.0 Mercruiser problems 20' maxum Not rated yet
I am buying a boat from my father. Last night we took the boat out on the river to give it it's first trial run of the year. The boat started fine and …

Mercruiser - Port Engine Issue 1988 Sundancer Searay Not rated yet
I can't get my port-side engine to stay running. A while back I thought I might have some bad gas, but the problem seemed to straighten itself out. I let …

Mercruiser shifting problems Not rated yet
I have alpha one mercruiser and it will not shift in reverse and forward. I can get one or the other but not both. Tried every way possible to adjust cable …

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0hp mercury triple cylinder 1981 sea raider water pump? Not rated yet
I have a 1981 sea raider boat with a 70hp mercury triple cylinder 2 stroke motor. It wasnt run in 2 years and i fired it up the other day on 2 year old …

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