Going to the Dark Side

[superdave1984]

This engine has a mechanical fuel pump which is fine. Here's where it gets weird. It seems that the guy who built it retained the original electric fuel pump and it feeds the mechanical pump. I assume the mechanical pump sort of regulates the pressure or something. Not sure. Anyway, not the electric pump appears to be dying.

Should I replace it and continue with the setup as-is? It does (did) work pretty well.

Disconnect the electric pump, modify the return line to be used as the fuel line and just keep going with the mechanical?

Replace both with a good low pressure electric pump and block off plate where the mech pump was (I have one brand new for another project)?

Which is the simplest, most reliable, cost effective method? Not going to go with fuel injection so that's not an option. Too expensive at this time.

 

[ZMan]

Run only the mechanical pump, a fuel injection pump is way too much pressure for a carburated engine, im surprised it wasnt overflowing the float bowls.

 

[Die.Fledermaus]

Wait, which OEM pump did the PO keep?
If it is the low pressure in tank pump, I doubt anything bad would happen. If anything this would make the mechanical pump work even better.
If it is the high pressure pump, unless you use am expensive return style low pressure regulator it should cause lots of flooding.