Thread: Motor help

Last year at the NW trying to overtake panman my boat wouldnt go but would still idle fine. After a couple more trips i found that if i ran anything but full trottle it would be ok. But as soon as i went full trottle the rest of the day it wouldnt even get on plane. The next time i take it out it runs fine again until full trottle. It seems like something is sticking or maybe not returning after going full trottle. I have checked the carbs they are very clean. Motor is a 2000 40 Merc power trim. Has only had a gallon of oil in it since it was new so has very low hours. Any ideas before i take it to the shop? Thanks Tony

I'm not familiar with oil injected motors. Sorry I can't help.

I have a 99 Merc 40. Mine did about the same thing awhile back. Take off the cowl and air intake and make sure your carbs are spraying fuel and not dripping it. Also look for oil accumulated in the barrel of the carbs. Rebuilding the carbs fixed my problem. Be careful when the air intake is off. Mine backfired on me a few times.

You can find part number and drawings for your engine here.
http://www.mercruiserparts.com/selec..._nbr=40+(3+CYL

.)

There are some pretty good, helpful internet forums that can help ya. I know, the mercury board at bassboatcentral can help. And IBeenF'in hangs out at a few and should be able to give you some guidance.

Dayton

Is your gas fresh? Do you have a water seperator filter on it? Do you use Sea Foam?

yes,no,yes.:D are you thinking it may be sucking up water from the new type fuel and then it settling back out after it sits?

Originally Posted by IBNFSHN

Is your gas fresh? Do you have a water seperator filter on it? Do you use Sea Foam?

Originally Posted by Crappisaurusrex

yes,no,yes.:D are you thinking it may be sucking up water from the new type fuel and then it settling back out after it sits?

Borrow a portable tank and hose and try it. This will elimante any possible fuel or tank problem.

Thanks for the help. i will check this stuff out and let yall know.:D

try using high-test gas,,my other tracker i had with the 35hp ran better

prop slipping on the hub , maybe ?