water in oil

[boatsrwerk]

Hi everyboby looking for a little help here, I have 305 GM with OMC it has fresh water cooling,went to wake it up and had water in the crankcase,checked the comperssion and had 150 across the board,anybody have any good ideas where to start looking?thanks (had 50/50 antifreeze in the system)

 

[ken_23434]

Re: water in oil

was the oil in your crank case the 50/50 mixture or just plain water?

That info will help you limit your search to the areas with the closed cooling circuit or the seawater side.

A pressure check of the closed circuit side will tell you if it is leaking. You if you do not have the radiator cap tester, you can "rent it" for free at Autozone. They charge you full price for the item, but you get a full return when you bring it back. Their Loaner Tool program is pretty handy for stuff like that.