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  1. M

    83 Johnson Seahorse 7.5hp - Knocking when accelerating

    Any ideas on the knocking that occurs every 3-5 seconds when i accelerate? When we tested the engine in a barrel w/o the prop it didn't do it. But once the prop is attached, it knocks consistently every 3-5 seconds after I give it 1/4 throttle. It doesn't cut out or sputter, just a loud thud and...
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