Question to Ilengine,
I have an Echo chainsaw that I converted to model airplane use. It refused to start after removing the engine from the saw.
I replaced the original carb with a Walbro off a Ryobi and it starts and runs fine. The "primer bulb" was labeled "purge valve" on the saw. I'm thinking the "purge valve" bleeds any air out of the carb, is this thinking correct?
Jeff