Quote Originally Posted by EagleMark View Post
That's really hard to get fuel to return below fuel level in any boat I have worked on, they have plastic tanks... I don't think I would attempt a fitting below fuel level?

Of course your right, but I have used that inline fitting above many times in cars and boats...
Getting fuel return below the fuel level is not hard at all, even in a plastic tank.

The '71 truck has a plastic fuel cell, when I swapped to EFI, I drilled a hole high in the tank, to avoid any leaks. I used a bulkhead fitting for -6 tubing. Inside the tank I added an extension, that had a 90* bend in it and ended the tube about 1/2" from the bottom of the tank.

In my boss' '62 Suburban, when I swapped it to EFI, I added a return tube to the sending unit, that extended down and was attached to the side of the pick up tube. This one also ended near the bottom of the tank.