Originally Posted by CasualGourmet
I have a feeling that the timing is going to be the first suspect. I have a professionally rebuilt MC2100. What is the fuel outlet at the top of the float bowl...MC2150? Will it make a difference if I use a MC2150 in place of the MC2100 I took off due the problems I was having. I rebuilt the MC2100 twice and had a local dealership "calibrate" the carb but it they said to just buy a new one and got it back and it runs worse than when I took it there. The new carb I bought is a MC2100 D...is that going to make a difference?. Thank you for the link on the carb!!
Its the bowl vent, keeps the fumes from building up. It goes to the charcoal canister.