ORIGINAL: Mike Connor
My guess would be leaking air at the base of the carb. If you can put your finger over the carb opening and it doesn't die try sealing the carb base.
I tried that, and it finally died, but it took it a while. I took the carb off and reseated it, but I don't think it solved the problem. When you say "sealing the carb base", what method do you use to seal it?