RE: HELP! SUGGESTIONS PLEASE - Which fuel pump for a large (45cc) petrol (gas) engine?
Are you running muffler pressure into the tank or carb? Correct me if I am reading this wrong.
You need a crankcase port to the carb to provine the pulses for the carb pump to work. Muffler pressure would not be strong enough?
I have never seen muffler pressure used on a gasser.