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Thread: Idle Adjustment for 4165

  1. #1

    Default Idle Adjustment for 4165

    Just joined the forum and have a question. I have a 4165 (list 6512). This model has the idle adjustment screws where turning screws counter clockwise leans the air/fuel mixture and clockwise enriches the mixture. I cannot find the proper method to initially set these idle adjustment screws. Thanks for your assistance.

  2. #2
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    152

    Default

    Not different from other Holleys, just the idle screw threads are reversed.

  3. #3
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    152

    Default

    See Danny Cabral's post, Helpful Holley Carburetor Documents (quick start carburetor installation instructions).

  4. #4

    Default

    Quote Originally Posted by hotstuff View Post
    Not different from other Holleys, just the idle screw threads are reversed.
    The threads are not reversed. Sticky label above adjustment screw says CC to lean mixture.
    Turning counterclockwise makes screw come out toward you as normal threads would.

  5. #5
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    152

    Default

    OK, backwards idle adjustment. In to enrich and out to lean, opposite of normal.

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