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    78 Mercury 40 hp 402 high idle

    Greetings, I have a 78 Mercury 402 that won't idle down for anything. New carb, stator, fuel pump, switchbox, water pump, terminals are good checked tdc and flywheel is correct. Ran well a week ago but hard to start. Found high voltage peak from brand new stator so was advised to change...
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    78 Mercury 40 hp 402 high voltage from stator help!

    I recently bought a 78 402 Mercury boat and it never ran right from the start. I'm completely new to outboards and found through similar forums how to check around these motors. The original problem was an extreme surge I the idle . I cleaned terminals cleaned the carb found bad wirinj on stator...
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