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Thread: Holley Rebuild Mystery Part

  1. #1

    Default Holley Rebuild Mystery Part

    I'm in the process of rebuilding a Holley 600 cfm carb and I found a mystery part in my cleaning solvent during the rebuild. I don't recognize it, but it looks like a needle seat pin. Can anyone please tell me where it goes and if it's part of the carburetor. A picture is attached.
    Click image for larger version. 

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  2. #2
    Join Date
    Jan 2010
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    That's the accelerator pump outlet check valve, which is fitted into the vertical channel under the accelerator pump nozzle. The accelerator pump won't work without that part fitted. Gary
    Regards, Gary

  3. #3

    Default

    Thanks for the response Gary. If I'm not mistaken, the accelerator pump is at the bottom of the carb near the front of the front bowl (drivers side). I assume that the check valve goes in prior to the gasket/accelerator pump with the pointed section facing up. Any pictures you might have would be appreciated. Troy

  4. #4
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    Troy, the pointed tip faces down into the channel below the pump nozzle screw. Gary
    Click image for larger version. 

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    Regards, Gary

  5. #5

    Default

    Thanks for the picture. That'll be an easy fix.

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