hi everyone, hopefully some pros out there have some good advice to offer. I bought a 93' moomba last year, equipped with a 351w pcm. I've owned many boats in the past, but never had the identical problem to whats going on here.
Last year the boat ran perfect all year, no issues what so ever. I had winterized and store for the winter. Two weeks ago I went through the entire boat, tune up, oil change etc. then brought the boat out twice. After each day getting home I checked over everything, with no findings of anything wrong. After my third day out, I found water in the oil (Light tan color.) I started off simple with flushing the junk oil out, and replacing the filter. Boat was ran in the driveway but I couldn't replicate the problem. About 30 mins in the pond (fresh water) and the milky oil came back rather quickly.
Last night I took the ex. manifolds off, intake manifold and heads. To my eye, the intake manifold gasket looked junk but I had someone stop by that is familiar with these motors and he doesn't seem to to think that the gasket was my problem. Onto the heads, everything looked perfect. Both heads and gaskets. I will attach pictures to this post.
A little more info: Ex. manifolds and gaskets were done last year (not by me, and I do not know about risers)
- Air temp has been about 65 degrees out
- Water temp has been about 45
- boat ran perfect each day on the water, at high rpms it was cutting out just slightly which it hasn't done in the past.
- to my fault, I didn't run a compression check before I dismantled the engine
- As the boat was running I had a temp gun on it, nothing but the risers were over 100 degrees
- I can't find any crack in the block or cylinder walls
let me know what you guys think, is there somewhere else I should be looking for a leak? Or put it back together and check again for water? (yes ill run a compression check this time) Thank you in advance for you help!
Last year the boat ran perfect all year, no issues what so ever. I had winterized and store for the winter. Two weeks ago I went through the entire boat, tune up, oil change etc. then brought the boat out twice. After each day getting home I checked over everything, with no findings of anything wrong. After my third day out, I found water in the oil (Light tan color.) I started off simple with flushing the junk oil out, and replacing the filter. Boat was ran in the driveway but I couldn't replicate the problem. About 30 mins in the pond (fresh water) and the milky oil came back rather quickly.
Last night I took the ex. manifolds off, intake manifold and heads. To my eye, the intake manifold gasket looked junk but I had someone stop by that is familiar with these motors and he doesn't seem to to think that the gasket was my problem. Onto the heads, everything looked perfect. Both heads and gaskets. I will attach pictures to this post.
A little more info: Ex. manifolds and gaskets were done last year (not by me, and I do not know about risers)
- Air temp has been about 65 degrees out
- Water temp has been about 45
- boat ran perfect each day on the water, at high rpms it was cutting out just slightly which it hasn't done in the past.
- to my fault, I didn't run a compression check before I dismantled the engine
- As the boat was running I had a temp gun on it, nothing but the risers were over 100 degrees
- I can't find any crack in the block or cylinder walls
let me know what you guys think, is there somewhere else I should be looking for a leak? Or put it back together and check again for water? (yes ill run a compression check this time) Thank you in advance for you help!