Milky oil but engine turns over

[bsivia]

Hi, I have a 2005 bayliner 175 with 3.0L mercruiser. I didn't winterize it properly so ended up with water in oil. I drained the water/oil and replaced it with fresh oil. The engine turned over fine. I drained the oil again, it was still milky. I repeated this 2 more times and ended up with fresh oil draining. I was cranking the engine for approximately 10-15 minutes in between.
I'm planning on testing the boat in water next. I'm wondering that if there is a crack in gasket or block, would the water show up in oil when i take it out in water? The engine isn't really doing any work when I turn it on using the bunny ears. Thanks in advance for any useful information.

 

[tpenfield]

Welcome to IBoats.

Improper winterization and water in the oil tends to be a permanent situation caused by a cracked block or cylinder head.

I would expect the milkshake to come back once the engine is used under normal boating loads, etc.

 

[Bondo]

I didn't winterize it properly so ended up with water in oil.

Ayuh,..... Welcome Aboard,.... That's a Fatal situation,....

Don't go to far from the dock when ya lake test it,....

 

[bsivia]

Thanks guys, I'll take it easy on the first ride and keep checking the oil.

 

[R055]

Yeah replacing the oil is just wasting oil. Guessing you used the antifreeze + muffs method?

 

[bsivia]

I wanted to provide an update.
Took the boat to the lake, it ran fine. No water in oil. The temperature and oil pressure were normal.
Changed the oil and filter again after taking it out the first time. I have been out a couple of times since then, and everything seems to be working fine.

I do live near Vancouver, Canada and we dont get extreme winters so perhaps might have been saved...

 

[Bt Doctur]

Simply changing oil does not get all the moisture out of the oil .you have to run the motor at normal operating temps for atleast 2 hours running time.
Running on plane, not idling

 

[bsivia]

I've had the boat running in the lake (I would consider that normal operating condition) for perhaps over 10 hours now. I have not noticed any moisture in oil.
Any idea on how I can get all the moisture out?

 

[Rick Stephens]

Sounds like you are the luckiest person around. What you are doing is the correct method, run it hard so you boil the water out. I would have expected a cracked something, but it sounds like maybe the water came in from some other path. A couple ways are bad exhaust shutters and the water got in at the end of the last trip last year? Or rain was able to get in through the carb? Keep an eye on oil level. If it goes up, you won't necessarily see milky oil on the dipstick, but you are adding water to the pan.

 

[wahlejim]

I was thinking the same thing, Rick. Water got where it shouldn't some way. If not through a cracked block, shutters or a bad gasket somewhere. I think you are boating on borrowed time right now until you figure out what happened.