Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship


      

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lv-ab: Re: Voltage spike from starter motor.

From: Arild Jensen (no email)
Date: Fri Nov 02 2001 - 21:26:38 EST

  • Next message: Arild Jensen: "lv-ab: Re: Voltage spike from starter motor."

    At 03:29 PM 11/02/2001 -0600, Rick Morel wrote:
    > However I do disagree on the probability of it happening. My opinion is
    it's extremely rare.
    >Going back to the automotive analogy, how many cars, trucks and even busses
    >and 18-wheelers have a battery cutoff switch? Same for really big diesel
    >generators.

    REPLY

    Rick, you are forgetting the age old mechanic's trick of jumpering the
    solenoid bolts with a screwdriver or something.

    To see if the starter is really bad or if it is the wiring, solenoid or
    some other part of the circuit that is bad, most mechanics will jumper the
    contacts. If you happen to be touching the metallic part as the voltage
    collapses, you do get a kick.
    And if you are very sweaty, your skin resistance is so low you do get a jolt.

    Depending on where you other hand or feet are placed you can get a nasty
    jolt and some current going through you as it returns to the battery
    negative.

    Been there, done it and lived to tell the tale. Even have the knife blade
    with the burn marks to prove it. < grin>

    Cheers

    Arild
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