milky oil 454 mercruiser

[derekmc1]

I have a 1987 wellcraft antigua with a 454 7.4L mercruiser. Raw water cooled. My oil was fine all summer and about 2 months ago I towed a capsized boat to shore this was really hard and my boat was quite weighted in the stern. I checked my oil the next day and it was milky. took 3 changes to get it clean again. Oil stayed fine all summer right up unitl I pulled it out of the water this weekend (with crane onto a craddle). I went to winterize it and again my oil is milky. When it happened the first time I checked my risers and they were fine.

any thoughts on why all of a sudden I have chocolate milk for oil? could the liftign caused water from the exhaust to get into my oil? I am really frustrated i have no clue any help would be great.
thanks,

 

[Alpheus]

Re: milky oil 454 mercruiser

When was the last time you checked the oil before you found it this way?

If the water was just introduced while it was being lifted it wouldn't be a milkshake with the engine running to mix it up.

How did you check the risers, and did you check your exhaust manifolds also?

Have you ever checked your flappers? You did say stern was very low in the water.

 

[derekmc1]

Re: milky oil 454 mercruiser

Week #1 i check ed the oil it was fine no sign of water at all.

Week #2 lift boat out of water, on shore run with muffs to warm up oil for changing. then check oil to find it milky.

have never checked flapper, is this where the y pipe comes together at the bottom?

a few months back i took off the riser found no sign of water at all.