Hi Grumpy, turning it back off from the compression stroke it will start and run properly but still puzzled about the "backfire" (thats what i'm calling it) which seems to be coming from the air filter carby region, as there was a small puff of smoke that came out of air filter just before it acctually kicks over. For example, whirl whirl bang then starts as if nothing happened.(the whirl is the motor turning over). So other then that acctual bang it is running perfectly.
