I GOT IT FIXED!!! The tank vent was the first problem, but then it got worse as I couldn't even make 1 lap last weekend. Come to find out, the other demon was the float height (yes I did check it before) it was not set right. Why does the needle have a spring loaded pin on the back? (GRRRR....THE NEXT PROBLEM) The float was actually set to high (or low) however you see it, because the float was pushed down on the spring pin. I went back and set it very carefully, now the hog will run full blast no problems. This motor sure got lucky not to become my new boat anchor!!!