confused

by ROb
(Tucson,az)

I recently bought a 1986 Seaswirl 17' with the OMC 3.0L with a two year old rebuilt motor. I've taken it to the lake twice now, but it is not running correctly. The first time I took it, the highest rpms I could achieve was 3400 at 32mph(via GPS). The max operating range for the motor is 4200-4600 rpms. The boat was very slow to plane, taking a minute or more to do so, and not even able to plane with more than three people on board. When I got back from the lake, I checked the prop size(13 1/4X17P), which appears to be correct although it does have a few small chips in the blades. I changed and gapped the plugs, changed the oil, checked the points and cleaned the carb. I checked TDC, so I know the mark is correct on the crank. I then checked the timing, only to find it set at 30 degrees above TDC when it is supposed to be set between 1 and 4 degrees above TDC. I set the timing at 4 above TDC, and tuned the carb to idle at 550rpms. It was all set to factory specs. When I get to the lake the second time, the boat wont even start until I advance the timing. Once I get it running, I can only get 2900 rpms out of it and it would only plane with one person on board. Does anyone know what is wrong with my boat? I don't know where to go from here.

Click here to post comments

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