89 force 125 l-drive water in #4 cylinder help!!!

ejbalboa

Recruit
Joined
Jul 5, 2008
Messages
4
hey guys wondering if someone has an idea of whats going on whith this motor.
i have a 1989 force 125 l-drive on a bayliner that i just purchased with lots of little probs but fixed most of them except for i keep getting milk shake liquid in #4 cyl which is the bottom cyl.
i thought it was the head gasket took it off looked good put a new one on any way, still same thing someone told me it could be the exhaust manifold gasket so i removed it and it looked good too.
however the bottom of the exhaust chamber on the engine block side was full of the milkshake being water mixed with raw fuel and exhaust gas i guess.
so much about 5oz. to fill that chamber to the point of the exhaust port of the bottom cyl .i drained it out and put on a new gasket .started right up idling about 800 rpm.
after about 30 seconds of running the motor would get these strong misses like a quick mild engine braking i guess water was trying to hydraulic the cylinder it kind of went away the next 10 seconds or so .
so i turned the engine off and removed the plug and again milkshake shot out of the plug hole. i am a motorcycle mechanic auto mechanic not too much a marine engine mechanic but this thing is baffling me .the head is not cracked well visually any way nor the exhaust manifold either could it be comming from the intake? help!!!!!!!!!
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: 89 force 125 l-drive water in #4 cylinder help!!!

Sounds like you've covered the most common obvious causes. I had similar problems with a 125 Force that I had. Turned out to be a warped head. Had a machine shop that specialized in outboards deck the head and fixed the problem. I tried a regular automotive shop first, but the finish on the head was too rough (just my guess). It still didn't seal. There's not much surface area to seal out the water in the 125 Force (and many other brands of outboards). I'm no expert, but it seems the tolerances on the sealing surfaces for the 2 stroke outboards seem to be a little more critical than a 4 stroke automotive engine.
 

ejbalboa

Recruit
Joined
Jul 5, 2008
Messages
4
Re: 89 force 125 l-drive water in #4 cylinder help!!!

thats intresting that the machining from one shop to another would make that much difference.
ill take the head off again and take it to a good marine shop see what happens.
totaly appreciate the advise, will keep you posted thanks ejbalboa.
 
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