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1974 MC Needs a New Carb

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  • 1974 MC Needs a New Carb

    I have a 1974 (yes, that's not a typo) MC.

    I can start it by dribbling some fuel in the carb. I can keep it running at about 3,000rpm, but below that, it dies. I have not used it for 3 years. I have started it in the driveway, but have not made it to the lake.

    With the help of a friend, we have determined that it needs a carb replacement or re-build.

    The carb on it now is an automotive Holley 4bbl (no j-tubes).

    Even if the carb isn't the whole problem, I know I should put a marine carb on it.

    I saw a previous post where TMCNo1 recommended some sources for Holley carbs. I have seen those site also.

    My question is: Do I just buy a Holley 4160 (, Holley #80319
    600 CFM, Electric Choke), or, are there some variations that I need to know about?

    The picture on the National Carburetors website looks very much like my carb. I have attached a photo.

    Thanks for any help.
    Attached Files
    2002 X30
    (Previously 1974 S&S)

  • #2
    If it is a 302, then it may take a different 4160 shown on the Holley site,
    Charter Member Number 1

    Quote: 2RLAKE,
    At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.


    • #3
      Good question. I have always known it to be a 351. How can I find out for sure?
      2002 X30
      (Previously 1974 S&S)


      • #4
        I talked to a guy at MasterCraft of Orlando. He was helpful. He told me that the distance between the intake bolts (width of the manifold) indicates if it is a 302 or a 351. 9" = 302, 11" = 351.

        I bought a throttle/trans control from him many years ago. Website:
        2002 X30
        (Previously 1974 S&S)