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  1. #1
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    Stock fuel pump is 90 ltr p/h ... Are you for serious? - MINI DIY WALBRO 255

    Is that wimpy POS all thats pumping fuel in the newer skis (And older ones by the looks of it)

    Bosch PN 0 580 453 431

    I was wondering why my AFR was showing rising lean on steady load after a short few secs.

    100 lbs + stock fuel pressure reg + e85 = Running out of fuel big time, even as low as 5800 rpm holding steady.


    Just found that walbro install page,

    Thanks for all that posted in there.


    I'm gonna try a simpler method to insert a walbro 255... See if it works, will post pics when done.
    This could be an epic fail, but I have a faulty fuel pump assembly spare so I'm not too worried...

    Comparison of OEM and WALBRO:
    The feed is ~7mm 'too tall' compared to oem.


    This pic shows the feed stem which has had the rubber insert removed.


    Funnily enough it measures 7mm:
    Last edited by lolzer; 10-23-2012 at 04:28 AM.


  2. #2
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    Before going further, do yourself a favor and block up any existing fuel feeds with clean cotton wool or microfibre:


    Then proceed to cut the 7mm protrusion off, clean out the fuel inlet and then removed the cotton wool, and clean again.


    Test fitting the rubber insert (It actually moved down another 4mm or so... I'm hoping it can squish the last 3mm or out comes the knife again:


    This is how it looks refitted:

  3. #3
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    Quick test fit tonight:





    To be continued tomorrow...
    (Could be an epic fail but all points to this working out ok)
    Last edited by lolzer; 10-23-2012 at 07:32 AM.

  4. #4
    boost junkie skidoochris's Avatar
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    its worth a try
    I use 2 pumps..stock to fill the surge tank and my bosch pump for steady high psi fuel
    Last edited by skidoochris; 10-23-2012 at 07:55 AM.

  5. #5
    Gomer Pyle starter99's Avatar
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    i got a brand new walbro i let go cheap

  6. #6
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    I'm sure it will struggle with 100 psi but it will be fine for what I'm doing.
    100 lbs injectors @ 45 psi and not a rev more above 8000

  7. #7
    boost junkie skidoochris's Avatar
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    that makes more sense.. thanks for the clairifacation
    do you have e-85 at the pump there?

  8. #8
    JT jpt7779's Avatar
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    I think what you are doing is great, saves having to remove the stock fuel line and fittings, go for it!

    http://www.greenhulk.net/forums/showthread.php?t=183968, post #9 and 10.

    The Walbro WILL work just fine for your needs and draws LESS amps than the Aeromotive.

  9. #9
    rxpredviper's Avatar
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    Walbro 450 I the way to go , I'm running a straight e 85 I 40 pounds of feul. on 30 pd boost and 10000 rpm with no problem...walbro 255 and 405 are not made for e85...

  10. #10
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    Quote Originally Posted by rxpredviper View Post
    Walbro 450 I the way to go , I'm running a straight e 85 I 40 pounds of feul. on 30 pd boost and 10000 rpm with no problem...walbro 255 and 405 are not made for e85...
    10,000rpm? 30psi boost?! id like to hear that!

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