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  1. #1

    Default low rpm knocking

    I am getting what seems to be knocking at low rpm. It happens when I engage my transmission and let it idle engaged. The tach is reading around 800 rpm. When I give it more throttle it goes away and seems to run good.

    Could this be a timing problem?

    The engine is a Indmar 350. Carb version, 310 HP.

  2. #2

    Default Replying to Topic 'low rpm knocking'

    What octane do you use?

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