Used the new to me boat for a total of 2 1/2 hrs.

Changed oil before i used it for the first time, and noticed a little moisture. Chalked it up to condensation, since it was cold when I heard it run. bought the boat, and brought it home.

Ran on the water for 45 min. Thought the oil psi was to high, so I changed oil again and noticed about the same amount of moisture.

Sunday was out for a few hours, probably ran the boat a total of 90 mins. Got home, and it was obvious something was wrong.

Got to checking, and noticed all the intake bolts were loose. Bit the bullet, and pulled the intake, and replaced gaskets.

Ran 2 more oil cycles through it, and both look just as bad.

Not sure where to go next. Leakdown test? Can you pressure test the oil Cooler?

is it registering higher on the dip stick?

yes you can pressure test the cooler,,,need to remove it from the boat,plug one hole and install a 3/8 x 1/2 barb fitting in the other end and attach a air hose to it. then regulate the air pressure down to 50 psi and stick it in a bucket of water and look for air bubbles..

also did you pull the valve covers to see if the top of them are slimed,,couls be mixing with the oil after it gets hot..

Sunday it registered about 1qt higher on the dipstick after running about 90 mins or so.

tonight while on the hose, it didn't seem to change at all.

I have not pulled a valve cover yet. Center of the motor was caked with milky oil. I pulled all the spark plugs, and they all look about the same to me. Motor runs like a top.

warm the motor,after the engine is warm remove the hoses going to the thermostat housing and connect a hose looping one into the other,remove the hose at the transom that feeds the sea pump or the one at the sea pump a and shove a garden hose in the end of it..clamp it tight and turn the hose on and listen for water entering the engine through the valve cover oil fill also watch the dipstick's oil level..if you hear water trickling into the engine or you see the oil level going up you have internal problems..

Thanks. that is a good idea. will add that to the list of things to do.

Isn't normal city water pressure about 80psi If you do this make sure you don't turn the garden hose on full flow. Just enough to get flow out the exhaust.

First thing I would be checking is the exhaust risers, then intake, then head gasket. A quart is quit abit.

If you have a crack in a block, it would fill the crankcase up in a matter of minutes.

no exhaust manifolds. Lightning headers.

Leak down test will be coming soon.

Mine is 45 psi but at the end of a 100 ft 3/4 '' hose its about 20-25.. it you have a internal leak,this way you will be sure to find it quick

yes just crack the spicket a little..

Are they dry or do you have water running to them?