Do you have to have the attachment for fuel inlet on the motor? I bought a 7.5 ev and the fuel line runs straight from the fuel tank to the fuel pump, my motor runs only in choked position. It looks like a new carb, i unplug the fuel hose from carb and no fuel is being pumped? Is fuel constantly supposed to pumped to carb? Bad fuel pump or or am i supposed to have attachment at motor for the gas ta.k to plug in?