I'm trying to install the separator this morning but I'm having problems with it pulling the fuel into the line with the bulb. Do I have to have the unit mounted below tank level (currently mounted above the fuel tank). I don't have my motor mounted yet on my pontoon (just picked it up on Saturday from a rebuild) so I'm wondering since the fuel plug isn't pushed into the motor, would this cause the system not to "charge up" with pressure in the line? I've squeezed the bulb numerous times with no sound of fuel being drawn from the tank. I know every clamp is tight and I have new fuel lines also.