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Black rubber plug on low speed jet

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  • Black rubber plug on low speed jet

    I have a '98 40. I was rebuilding te carbs and noticed black plugs the jet housing. Was curious on why this is. I thought that they were supposed to suck and shoot fuel..... Can anyone explain to me why these plugs are in and how it works?

  • #2
    It makes it where all the fuel that gets into the motor comes through the main jets.
    There is a side passage from main to idle jet area just to keep from idle jet from pulling fuel directly from bowl

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