Electric fuel pump as lift pump?

[bevans6]

An awful lot of systems use a lift pump to pull fuel at low pressure out of the fuel tank to feed the high pressure injection pumps.  Is there any advantage to doing this on a DD two stroke?  I have this nice 24 volt  12 psi 35 gph diesel rated fuel pump sitting here, to eventually be used as a priming pump when I get around to that,  and i couldn't think of a good reason why it couldn't be in the line all the time, ticking away, pulling fuel up to the engine?

Brian

[luvrbus]

Won't do you any good Brian the fuel pump on the 2 strokes moves 65 GPH @ 60# for the standard pump


good luck

[bevans6]

I forgot that it moves that all the time and unused fuel is circulated back to the tank.  Brain fart.  Oh well, it should do as a priming pump.

Thanks, Brian

[JohnEd]

Brian,

I think you can still install it at the tank and configure a permanent check valve/ball by-pass in parallel.  That way you could leave the pump in line and the main pump would pull pasty it but with the main off you could power the aux and move enuff fuel to prime.  35 gal/min would be overkill in that application and who amung us'n wood sae we don't need a prime pump?

John

[luvrbus]

I think you have a typo error John he said 35GPH   


good luck

[gus]

Having that pump as a standby primer can save a lot of grief alongside the road in the future. It is not difficult to plumb in parallel with a couple of shut off valves for isolation.

I plan to install one after having lost prime one time - it only takes one time!!

[JohnEd]

Nothing speaks with more authority than experience, Gus.  Nothing.  If you are changinf filters then you are out and about anyway.....right?

Thanks

John

[Jerry32]

besides that the seals on the engine pump may leak with pressure to the pump Jerry

[Greg Smith]

The fuel pump on my 8V71 quit and I put a cheap 12V electric pump in line. Bus runs great and you never lose prime.

Greg