rdoactive

26scarab.
I dont know of any electric pump that will work well at the top of the tank. You might want to talk to the pump manufactureres and expliain your situation before you buy.
BTW, I have seen mechanical pumps with electrical pumps in parallel. The electrics were turned on by a hobbs switch when fuel pressure went under 6psi.
Gary

SB

They can work very well over tank, but again, still need to be as low as possible. Thing you want to do is have the pump just lower than the highest point of the inlet line. This keeps a 'head' of fuel at the pump at all times. Very helpful for prime and start up and of course, life of pump.

Remember, your pick up tube comes to the top and just over top of tank. A few more inches won't change much, again, just as long as pump inlet is atleast a little lower than this point.

But yes, mounting below fuel level with inlet line mounted to bottom of tank is the best.

Note: Many electrical pumps that use fuel for cooling still have epoxied magnets. Epoxy can break down with todays fuel and let these magnets fall off and go thru electric motor and then you know where.

Aeromotive was one of first to have problems with this in marine environment and found a way to mechanicalyy fasten magnets.

cstraub

Weldon is hands down your best choice of the 2. You may pay more but they are bullet proof.

dave-01

For whatever its worth, when I added holley reds to my boat my mechanic told me to run marvel mystry oil in my gas and it will make the pumps last forever. He stated the fuels today are horrible as far as lubricating properties. That was 3.5 years ago and about 145 hours later...pumps still running like new...

Outdrive1

I've had good luck with the Aeromotive pump. I run from the tanks, to the valve, to the separator, to an Aeromotive 100 micron filter, to the Aeromotive pump, to the regulator, bypass goes back to the separator before the pump, fuel goes to the cooler, then to the fuel rail.
I was told if you don't use the 100 micron filter you would ruin the pump, the separator has two inlet fitting and two outlet fittings so it's easy to plumb it with your return line.

Nova 26

I have been using the Weldon in line pump for 3 years now with no problems. Weldon says it can be mounted above the tank. My engine is a 540 c.i. n/a that made 625 h.p. on the dyno.It does require a regulator and return line. IF you want to buy a fuel pump just one time, buy Weldon.