Can anyone tell me the exact way to set up the fuel tank connections on a pumped O.S. Surpass engine? I know one line goes to the pump from the tank, one line goes from pump to the carb, and the other line from the pump goes back to the tank. My question mainly is do I need to have a third line open for the vent at the top of the tank; and how should it be set up so I can pull the left over fuel back out of the tank. Will I need to install a re-fueling valve between the tank and the input to the pump. I have never used a pumped engine and I bought it used, with no instructions.