RE: Walbro problem....need ideas!
Ahhh, if it fires the first time and then no more... it tells that ignition is ok but carb is flooding. I'd close the high speed to about two turns out, and make sure the throttle is cracked open enough for starting and that the choke is opened after the pop. If that fails, then recheck everything on the metering system under the plate that has the four small screws. It has the symptoms of the metering needle not closing. Causes for that are 1. the little spring is missing or misaligned under the rocker arm. 2. dirt in the needle seat. 3. wrong metering needle. 4. diaphragm bulged inward and not allowing needle to close. 5. atmosphere hole clogged and not allowing fuel pressure to move the diaphragm outward.