Trojan Boat Forum

Went to Shumway marina where my friend just had a New big pontoon boat delivered.
Three big pontoons - a 25.5 footer and it is beautiful. He is a party guy and knows everybody.
Next to him a fellow in a trojan 10.8 meter who just made a routine check of his tranny oil and engine oil before going out today and in the starboard engine -it looked like there was water or something in the oil -it looked yellow.
He looked bewildered and said it could be be simple or serious. He said he went to oswego and came back the other day and everything was fine. No engine overheating or anything.He said it ran beautiful.He used the hand pump and sucked out the oil and changed the oil filter.
It ran and sounded beautiful just like he said and said he wanted to see how long it took to show up in the oil again.
I always thought water in the oil came from a bad head gasket and that is not cheap to fix is it? Could be cracked or warped head from overheating also-I don't know of any other way water can get in the oil.
am I right

Intake gasket is a good possibility.

A bad oil cooler is also a possibility.

never thought about the oil cooler.

boatsnbars wrote:A bad oil cooler is also a possibility.

Oh, the benefits of fresh water flushing your engine when you return to the dock.

RWS

boatsnbars wrote:A bad oil cooler is also a possibility.

+1

If not winterized correctly, the heat exchanging tubes can crack allowing both water into the oil and oil into the water.

winterizing?

is that when you put Christmas lights on the boat and participate in parades?

RWS

Don't know where you're located or if the application is RWC but improper winterizing can result in a cracked RWC block. Common to hear about this symptom at this time of year because of that.

A ruptured oil cooler will usually leave a trace of oil in the water through the exhaust due to the oil pressure at 40 psi or so. This will force oil out through the rupture/hole in the cooler and into the raw water stream exiting the exhaust.