Merc.90 4-stroke water in oil

[Ribfisher]

Hello ribbers,

This afternoon i did some inspections on my friends boat engine.
Mercury 90 hp 4-stroke year 2000
When i pulled the oil level gauge out,
i noticed a higher level on the gauge then normal.
I decided to take some oil out from the engine.
There was a lot of water coming out the first moment.
I think there is a problem with a gasket between the powerhad
and the upperleg.
Is there anyone who now this problem and to resolve it.

Thanks for replay.

[Jono Garton]

Could be a number of things, its time start stripping to investigate.

Are you 100% sure the engines not been under water?

The merc 90hp Four Strokes are normally bullet proof!

Jono

[Paul F]

As quoted ,it could be many a thing but i would stab a guess at, rubber seal for water pipe into adaptor plate plus some corrosion, off power head for that job, and not to bad ajob.
Paul

[Ribfisher]

Thanks Jono and Paul,

We will take of the power head this week-end.
Just ordered the gaskets at the local dealer.
Hope we will find the error.
I will post the results of this examination.