On the firewall are 3 different lines. The top is the fuel line, but I don't know what are the two smaller ones below it ? I am running a dellorto 48mm side draft & only using the fuel line to it. It seems just yesterday the 2nd line started spewin' fluid out of it so I ran it into a catch can that filled fairly quickly & looking inside, I would say...gas. These lines have been cut for a few yrs now when I had work done. Do I need to use them?

the largest of the 3 is fuel feed, the one just below it is fuel return from the stock carb and the other line is the fuel tank vent that went to the charcol canister. if you have fuel coming out of the lines you over filled the tank or the none return valve in the tank if equiped is junk.

Thanks, Must be junk.