Mercury 90hp 4 stroke

[crestlinermusky]

Hi everyone
My friend has a 2009 Merc 90 hp 4 stroke
It is used every weekend in the summer and is serviced twice every summer
It went into winter storage last November into a heated garage
Puled it out yesterday to service it and change the oil in the block
When we drained the oil,it was creamy in color. like there was water in it
Where should we look for a leak, or a faulty seal

 

[bruceb58]

Check your thermostat and see if it's stuck open. I have a 90HP as well and had water in my oil this year. Mine has the Yamaha engine unit but theory is the same. Stuck thermostat keeps the engine from getting up to temp and burning off condensation.