Can anyone give me a hint that might help me solve this problem? I'm an auto repair specialist, and don't know much about 2 strokes, so I bet any info will help. What I have is a 1960 Merc with a pressure fed Tillotson. Me and my father were fishing and ran through a little mud, tearing the impeller to peices. We didn't realize it at the time, so we continued accross the lake after we checked the prop. Other side of the lake, it started running like crap, spitting fuel out of the carb, and dying. We replaced the lower end seals, gaskets, and the water pump impeller. Runs a lot cooler now, but still runs the same, minus the spitting of fuel out of the carb(boiling fuel in the pump, I guess). Also after it runs a bit, there it this white oily substance at the carburetor inlet, like oil mixed with water, and the carburetor has quite a bit of condensation on it. I really hope somebody can help with this, I've never seen anything like it.