PA318Guy· Super Moderator
Ok fuel system is pretty easy, you have the two pickup lines in the tank, they go to the fuel switch on the left pedestal, that line goes to the fuel pump. The other line you can see goes to the carb. The line you cannot see is is the vacuum line on the backside of the fuel pump and goes to the crankcase, this is where the pulse is gotten to pump fuel. So if there is a hole in that line you won't get any fuel. I highly recommend that you replace any original fuel and vacuum lines first. Start with the pickup lines in the tank and work your way forward!