After fiddling around with where to mount the fuel pump, I decided not to mount the fuel pump to cross bars on the center cover. I did this for a couple of reasons. First, It means that the fuel pump has to come out if I ever need to remove the cover fiddle with the wiring. Second, the cross bars reduce the vertical space available for wiring under the cover. Instead, I’m going to mount the fuel pump mounting plate directly to the floor. I do need to be able to remove the fuel pump and controller if they ever need to be serviced, and I don’t want to have to remove the mounting plate since that will require two people (one for the screws on the outside and one for the nuts on the inside). To do that, I decided to replace all of the small metric nuts and screws with standard #6 AN hardware. I installed nutplates on the bottom of the mounting plate.
I then used some short AN515 #6 screws to screw the pump and controller down to the mounting plate. You can also see that I removed the terminal block and replaced it with a two connector molex connector.
Here’s where the fuel pump will be mounted. I’ll fabricate some short spacers and the screw this to the floor.
Moving the pump down made it a lot easier to bend this fuel line between the fuel selector and the fuel filter. There is tons of room around the fuel line, and plenty of clearance from the spar penetration holes for wiring. This also brings the pump pretty far back which keeps it completely inside the pump cover.
