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    1957 35HP Big Twin (hitting hard Knocking)

    My 35hp 1957 Big Twin at idle or even WOT slams at times.... meaning, seems like I hit something, motor will JERK Hard then go like normal for a few minuets, then slam again etc... every once in a while??? What causes this? NOTE, last time I was in the water an it had these symptoms I lost my...
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    1957 35HP Big Twin

    Did a fuel pump conversion that worked successfully took for spin etc.... Worked at idle for the 1st time ever and also cruised WOT for 20 min around lake back and forth WOT to idle etc... worked like a CHAMP! THEN.... Boat sat for about 2 weeks when I went to start it would not turnover...
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    1957 35hp Big Twin Carb Needles no effect on motor.. HELP

    :facepalm:rebuilt carb because wouldnt idle so followed forum examples etc.. thought I did everything correctly, but seems I screwed something up bad... Now, neither of the adjustments have no effect on engine... turn high 1 1/2, or 1000 turns does nothing to engine for both adjustments...
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