I have a GCV160 here starts ok on full choke but the slightest attempt to move off choke and it stops. Normally I would just rip the carby off and put it through the ultrasonic but I think there is something else going on. I have checked the valve clearances and they are fine. What concerns me is that when pulling this motor over there is an unusual "choofing" noise coming from the exhaust or maybe head gasket. Any thoughts?
