CRRC 40cc gasser problem
I have a CRRC 40cc gas engine fairly new with a excel ignition. The ignition calls for a 6 to 7.4 5 cell battery. My problem is it pulsates thruout the running of the engine. It will idle OK but if I give it fuel it will pulsate up & down. Have checked the carb gaskets, set the Hi & L o at 1 1/2 turns & ran both screws out & in. The ignition is set @ 28 Deg. just what rcexel calls for. The only thing I think is it might have is a air leak somewhere. Any help would be appreciated.