Grey foamy substance out of propeller exhaust

[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?

[kamikaze]

In my opinion there are two ways to get that much oil. Lower unit is leaking ( view lower unit oil for water intrusion and then pressure test it to verify fix). or your exhaust manifold is purging all the oil/ carbon that had built up in it. I asked about the oil being used as I have found significant oil purging from the exhaust after overheating a engine if the oil has a decarb / cleaning additive. And the oil you show is more grayish than rainbow stained indicating he oil has already then burnt. I agee with Phat, Pull the spark plugs to verify no water intrusion in clyinders after head gaskets install (will also purge exhaust). If not and the lower unit pressure checks go run it and see if it cleans up.

[smokeonthewater]

have you done a compression test on this engine?

[BuilderFL]

Guy, no water in the plugs and compression is all within 5 psi (110-115) and I am almost certain that it had more to do with the Sea Foam and purging old carbon than anything else. All the grey stuff is gone but I cant get her to idle correctly. Since Im back on the road my mechanic is picking up the boat tomorrow and will take a look at it. I will post results as soon as I hear back from him.
Thanks for your input.

[bradford]

Hope it works out to something cheap for ya builder!