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Technical Fuel out of Accel. pump hole? Stromberg 81

Discussion in 'Traditional Hot Rods' started by FlyinA, Feb 1, 2020.

  1. FlyinA
    Joined: May 17, 2017
    Posts: 96


    I’m running dual original 81s on my Model A. After running for a minute fuel will suddenly start coming out of the accelerator pump hole! The inlet valve seems good and i dry set the float level, what might cause this?
  2. alchemy
    Joined: Sep 27, 2002
    Posts: 15,333


    What's your fuel pressure?
    stillrunners and dana barlow like this.
  3. dana barlow
    Joined: May 30, 2006
    Posts: 3,842

    dana barlow
    from Miami Fla.
    1. Y-blocks

    Like Alchemy ask? More then 3 PSI can over come float,add to that if motor vibs are high{out of balance a little} it can bounce float too
    stillrunners likes this.
  4. Do you have the felt washer at the top of the accelerator pump rod ?
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  5. Larry W
    Joined: Oct 12, 2009
    Posts: 729

    Larry W
    from kansas

    FlyinA likes this.
  6. Jet96
    Joined: Dec 24, 2012
    Posts: 1,085

    from WY

    ^^^Yup been down this road, I messed with the 97's on my roadster a lot. Couldn't get them to quit randomly overflowing. Installed a holley regulator and enjoyed a whole summer of leak-free motoring. I'm assuming you're not gravity fed from the cowl tank...
    FlyinA and winduptoy like this.
  7. FlyinA
    Joined: May 17, 2017
    Posts: 96


    Thanks all for the replies! I'm running a Holley low-pressure regulator right now, its supposed to be set at 2.5psi out of the box but I'm not gonna trust a piece of paper so I ordered a pressure gauge today to see if I can eliminate the issue

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