White, milky sludge.

[Hoyt79]

It's coming from the exhaust at my prop with the muffs on...what is this and why is it there and is this any cause for concern?

 

[Will Bark]

Re: White, milky sludge.

It's unburned gas and oil if it's milky and smells like gasoline; nothing to worry about, you wouldn't see it if boat was in the water.