Grey foamy substance out of propeller exhaust

[BuilderFL]

I use the west marine 2 cycle oil, premix. Woke up early to work on the boat and its been raining hard.

[BuilderFL]

Found the culprit; oil seals below water pump base were not installed correctly when I replaced the water pump. Thanks guys!

[BuilderFL]

I was using the wrong O ring at the base of the water pump and it did not go all the way in. Well, I replaced it and it's doing the same thing. Could it be the Sea Foam?
Joe, whats the OMC?
And there is no oil from the lower seal.

[smokeonthewater]

Originally Posted by BuilderFL

whats the OMC?

OMC is the parent company, Outboard Marine Corporation, that makes Johnson and Evinrude engines.

I think Joe missed that it was a Mercury

[BuilderFL]

This is what I'm talking about;

http://i138.photobucket.com/albums/q...ps74f34d04.jpg

http://i138.photobucket.com/albums/q...ps0f689a27.jpg

http://i138.photobucket.com/albums/q...ps15ae11de.jpg

[spareparts]

was there any on top of the water pump housing when you dropped the lower unit?

[phatdaddy]

builder, you said you replaced the head gskts after the overheat episode, were they blown and water was getting in the cyl or where you just being proactive?