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  1. #1

    Question Idle / Fuel mixture screw

    75 20HP merc
    rebuilt carb, top end runs great! but i cant get a smooth idle.
    How sensitive should the Fuel mixture screw be?

  2. #2
    Supreme Mariner
    Join Date
    Sep 2004
    Location
    northern michigan
    Posts
    12,075

    Default Re: Idle / Fuel mixture screw

    When the mixture is close it's quicker than if off a long ways. Adjust in gear and warm if it won't adjust then redo the carb.

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