That was the problem I went back out and over the engine agian and found 1 of the head bolts was loose from the factory. Damm I feel like a newbe the one place I never thought to look. I just put 5 tanks though it over this afternoon runs great I take back my bad mojo about this engine. It has how ever ate the wheel on my ofna truggy box even after heating it up every time after a heat cycle.



thanks