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Jeremy R
Jeremy R, Mechanic
Category: Boat
Satisfied Customers: 9020
Experience:  Multiple factory certifications 20+ years of experience.
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I have a 40hp mercury 2010 model the oil in the sump is a creamy

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I have a 40hp mercury 2010 model the oil in the sump is a creamy colour and level is rising
Don't know what the problem is changed the oil 20 hours ago and it's rising again

Jeremy R :


Jeremy R :

Oil rising and being creamy color is a sign of water intrusion. This is mostly likely from a failed gasket. Either way the engine needs to be diagnosed by a mechanic as soon as possible. Having water in your oil for long will cause internal rust and will permanently damage the internals of the engine.

Customer: Any suggestion what gasket it can be the engine is running spot on
Jeremy R :

Most likely not the head gasket then.
It's hard to determine without looking at it but possibly and exhaust gasket under the powerhead.

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