Fuel pump question

[vector1]

Originally Posted by Gaz64

If you mount the pump above the tank, the fuel will drain back and the pump will have to self prime every time.

That's why you mount the pump near the bottom of the tank.

The fuel level will always be above the pump.

so if the pump is below or at the bottom of the tank, does the portion of fuel in the line coming out of the tank drop back into the tank?

my point is the fluid doesn't know where the pump is, as long as there is no air leak, the siphon is maintained.

[Gaz64]

Originally Posted by vector1

so if the pump is below or at the bottom of the tank, does the portion of fuel in the line coming out of the tank drop back into the tank?

my point is the fluid doesn't know where the pump is, as long as there is no air leak, the siphon is maintained.

Yes, that would true to a point, but if the pump is higher than the level in the tank some of the fuel would still run back to the tank.

Better off with the pump at the bottom of the tank.