Mine leaks out the air-inlet once in a while.. Like I flooded it,, but did not use the choke.. If I tap on the carb with the back of a screw driver,, and I turn off the throttle, and my batt. holds up, it usually starts after a bit... I'm thinking my float.,, or needle. But when running it will run fine for a long while ..
It usually happens when I shut it off for a few minutes and then try to restart it.. Good luck and I'll be watching this one...