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    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
     
    #1

    Jul 19, 2011, 05:24 PM
    Blocking diode, shifting diode on an evenude boat motor
    Old evenrude electric shift. The brown ball ( I believe it is the blocking diode) is smoking. Also, motor does not shut off by key all of the time, but sometimes it does. How do I test the diode, the power in to the diode, and could I just bypass the diode? Any info here would be greatly appreciated. Im a plumber, not a boat mechanic, so please bear with me, as I'm just trying to make an old boat go without having to use my fire extinquisher.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
     
    #2

    Jul 19, 2011, 06:35 PM

    I would replace the diode, you can easily test with an analog multimeter, conducts one direction, high resistance when you swap the leads.
    The kill circuit consist of 2 wires at the ignition switch, ground and Mag, when the mag is shorted to ground, it will kill the motor.
    Check your ground connection from the ignition switch.

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