Mercury 15 hp 4 stroke 2006 - Runs great dies after an hour

by Scott K
(Vancouver Island, BC, Canada)

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 an hour or so it starts to intermittently bog, dropping rpm by what seems 50 - 60 % then returns to normal rpm getting worse over the next several minutes.

(I tried opening choke and that seemed to make it stall faster,, I also tried squeezing the primer bulb, but it was already hard so made no difference)

It then eventually bogs and dies completely.

It will restart and run for 5 or 10 minutes then stall.

After a few minutes of that, it will stall and will not restart.

Leave it a few hours and it starts well and runs well.

I would appreciate your expert advice or anything you can suggest to fix or diagnose this.

Thank you
Scott

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Mercury Forum.