Merc 25hp Outboard; milky oil

[5outta6]

What are the most likely causes for milky oil?

thermostat?


Any info on the cause of milky oil will be greatly appreciated.

 

[5outta6]

Re: Merc 25hp bigfoot; milky oil---thermostat???

Re: Merc 25hp bigfoot; milky oil---thermostat???

bump

 

[5outta6]

Re: Merc 25hp Outboard; milky oil

bumpII:redface:

 

[Buddaorf]

Re: Merc 25hp Outboard; milky oil

If its Milky oil in your lower unit. Caused by water mixing with your oil. Its most likey a seal that has gone bad. Probably need to do a rebuild of the lower unit. Not too hard just take your time if you plan on doing it your self.

 

[5outta6]

Re: Merc 25hp Outboard; milky oil

If its Milky oil in your lower unit. Caused by water mixing with your oil. Its most likey a seal that has gone bad. Probably need to do a rebuild of the lower unit. Not too hard just take your time if you plan on doing it your self.

I should have mentioned the milky oil is in the engine oil ( 4 stroke bigfoot).
Lower unit is ok.

 

[oldgradywhite]

Re: Merc 25hp Outboard; milky oil

These 4 strokes seem to have a problem "making oil" oil levels rise. What I would do is get a spoon full of that oil and put a lighter under see if to boils if it does its water.