Kevin,

I just re-read your last post since I've been running hard with little time and am missing things here and there. Regarding the fuel line connections, one line should go to the carb from the tank. Not being familiar with the EVO 58 I don't know what the crankcase nipple would be for, except perhaps a nipple crankcase smoke fluid induction. As a rule there is only ONE line going to a gas engine, and that one goes directly to the carb.

Check with someone that has an Evo to find out about the crankcase nipple. It may just be a vent that needs to be left open.