Idle adjustment needle screws - NCRS Discussion Boards

Idle adjustment needle screws

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  • John C.
    Expired
    • September 30, 2001
    • 130

    Idle adjustment needle screws

    On a carter WCFB carb what is the best way to adjust these screws?
  • Duke W.
    Beyond Control Poster
    • January 1, 1993
    • 15661

    #2
    Re: Idle adjustment needle screws

    What year? There should be a section in the applicable service manual for "idle speed and mixture adjustment". It's usually the same for any carbureted engine, but there should be an initial setting for the mixture screws and an idle RPM target for the specific engine - in neutral for manuals and Drive for automatics. It's 1.5 turns out from the seat of the AFB. I don't remember the initial setting for the WCFB.

    Duke
    Last edited by Duke W.; April 10, 2011, 09:39 AM.

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    • John C.
      Expired
      • September 30, 2001
      • 130

      #3
      Re: Idle adjustment needle screws

      Thanks Duke it's a 59

      Comment

      • John H.
        Beyond Control Poster
        • December 1, 1997
        • 16513

        #4
        Re: Idle adjustment needle screws

        Originally posted by John Clemens (36866)
        On a carter WCFB carb what is the best way to adjust these screws?
        John -

        With a vacuum gauge - warm engine, normal idle speed, adjust the idle mixture screws for highest steady vacuum.

        Comment

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