Author Topic: Anyone know of a very reliable external 12V fuel pump ?  (Read 649 times)

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Offline EDDIEK

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Anyone know of a very reliable external 12V fuel pump ?
« on: May 4, 2020, 09:35:36 pm »
Anyone know of a very reliable external 12V fuel pump ?

Hurricane season here begins June 1. Searched online auction, under 12V fuel transfer pumps or external frame mounted fuel pump etc. 99.999% looked like cheap toys. So I decided to fabricate a 12 volt fuel transfer device using part  HFP-602 pump (a frame mounted external fuel pump made for a recent model Mercedes). It initially worked very well, and very quiet... emptying a 5 gal Jerry can, in about 2 min (a wild ass guess). I thought that I should flush it clear of gasoline, as I intended to store it and use it to quickly borrow off 5 gal from the RamCharger's massive gas tank for use in our whole house generator. It's preferable to waiting in a long line of people with short tempers. I do have several 5 gal Jerry cans, each always filled a week before any storm hits. However I always want to have a plan B.  One that does not have me manually siphoning fuel, in gusty, annoying winds, with rain going sideways. So the pump taking about 2 min, fit the bill.  The hose lengths are below. 
NAPA hose   H- 183   inside dia ..5/8 Inbound to pump 4 foot 
NAPA hose   H- 177  inside dia  3/8   outbound to collection  4 foot.

The problem surfaced a few days later when testing it, the impeller seemed to have seized up. I added some penetrating solvent either PB Blaster or WD 40 can't recall which, and a sharp rap on the case with a wrench was all it needed to free it up, and it flowed gasoline.
The 2nd time, I tried it ..was several days later. The impeller hummed away, but no suction via intake, no outflow on the outbound delivery hose.
I assumed that the water may have been the culprit, so I poured 5 or so ounces of Marvel Mystery Oil (MMO) into each hose end and hung it up on the garage wall with the pump at the lowest point, hoping that the MMO would penetrate all the areas that previously saw water or gas.
If that worked I planned after each use to to load it with the same amount of MMO stow it that way, coiling the hose over and over then tucking the outbound hose inside the inbound hose. The whole package was pretty tidy, measuring approx 2 ft L X 1ft H X 6" in in depth. 
       I don't know if running water through it was a fatal error, you would think that kind of fuel pump could shrug that off, or it's also very likely a failed cheap knockoff for $20.00, country of origin unlisted, what can you expect ?
I think the concept is sound, now it's a matter of finding a reliable rail mounted fuel pump, avoiding the universal / other flimsy looking questionable offerings I have observed.  I started searching for a 80's era Ford, or Dodge USA MADE ...OEM or NOS (non submersible) frame / rail mounted 12 volt, with one end  5/8 and the other 3/8 hose barb fitting. Nothing stands out as of yet.. If any one has done this already let me know, I did a search of the site, but no results were returned..   Thanks for all re your comments..
EddieK

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    Offline fenrir

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    Re: Anyone know of a very reliable external 12V fuel pump ?
    « Reply #1 on: May 5, 2020, 01:28:26 pm »
    I have installed several of these...way better than the little ones:

    https://www.oreillyauto.com/detail/b/precision-fuel-pumps-4602/fuel---emissions-16775/fuel-pumps-tanks-16472/fuel-pumps---electric---universal-17799/22d5b8966e1f/precision-50-gph-fuel-pump/e16371/4615545?pos=4

    They've held up well in my application (frame-mounted on 318 engines), but I don't know how good they'd be for xfr, especially speed-wise. 
    POSSESS:
    92 W250 Extended Cab Cummins*92 W250*85 W250*80 W150*79 D100*78W150*76 Ramcharger/1979 W250 frame*75 W100 440*73 W100*72 W100

    RETIRED:
    92 W250 Cummins*91.5 W250 Cummins*91.5 D250 Cummins*85 Ramcharger*85 W150 x 2*81 Trailduster*78 D150/RC Frame*79 W150*77 Trailduster*74 W100

    Offline EDDIEK

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    Re: Anyone know of a very reliable external 12V fuel pump ?
    « Reply #2 on: May 6, 2020, 11:29:08 am »
    Hi  fenrir:    Looks like a nice reliable unit. Is your 318 a marine application 24 V  ..or did you replace the mechanical pump ?
    If you replaced a mechanical, how did you deal with the 24 V. I would think inputting 12 V would half it's rpms..

    Re O'Riley .. I have been shopping O'R of late more often. I think their merchandise is a better quality like NAPA and their store webpages allow for in-house spec comparisons and navigation is easy, no wasted motion..
    Thanks for your assist..   Ed K

    Offline fenrir

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    POSSESS:
    92 W250 Extended Cab Cummins*92 W250*85 W250*80 W150*79 D100*78W150*76 Ramcharger/1979 W250 frame*75 W100 440*73 W100*72 W100

    RETIRED:
    92 W250 Cummins*91.5 W250 Cummins*91.5 D250 Cummins*85 Ramcharger*85 W150 x 2*81 Trailduster*78 D150/RC Frame*79 W150*77 Trailduster*74 W100

    Offline EDDIEK

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    Re: Anyone know of a very reliable external 12V fuel pump ?
    « Reply #4 on: May 6, 2020, 07:32:37 pm »
      No prob, appears to be a durable unit.. 
    Nice to have an alternative to on line auctions.. At least you can return it to a brick n mortar, etc etc..
    edK