Running an old 3310-1 rebuilt by me. Float levels, PV's, choke, idle and timing all set and perfect. No vacuum leaks. Carb is running rich and netting ~8MPG. I'm going to perform the standard trial and error method to tune the primary jets. I' curious if this poor mpg is typical of the 3310-1 and if anyone has had success in bringing the MPG up on this specific model carb.