quote:Just remember that the fuel pump inlet hose will be below the level of the fuel in the tank, and fuel will continue to flow once disconnected from the fuel pump.
Either pinch off the inlet hose, or disconnect it from the top of the fuel tank.
I re-plumbed my fuel line from the bottom of the tank and installed a Groco stainless marine 90-degree fuel petcock so I can shut off fuel flow in the event I need to service the fuel pump or a fuel line.
http://www.groco.net/seacocks.htm
The 1/2" male threads allow it to thread directly into the metric plug bung in the bottom of the tank. Initially it didn't seal completely - it had a pretty good drip. Then I reinstalled it with commercial grade fuel-safe pipe dope (thread compound?) and an O-ring from my local O'Reilly Auto Parts store (one of those generic "Help!" packages that contained various sizes). Hasn't leaked a drop since!
This valve is 1/2" throughout, so no tight banjo fitting to restrict fuel flow to my new 383 stroker engine. Also, it fits snug up against the tank so no part of the fuel system hangs below the frame rail, so nothing to get knocked off if you hit a speed bump or have an off-road adventure.
Funny thing is when we tried to start the new engine, we primed the carb but couldn't keep it running. One of the guys helping with the install connected the fuel line, but didn't know about the shutoff. After a few tries we were wondering if my buddy hooked up the fuel lines to the wrong fitting on the pump, then I remembered the shutoff, gave it a quarter turn, and fired it right up!