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  1. #1
    Cadet
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    Jul 2010
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    Potomac Falls, VA
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    Default Install Kill Switch?

    Does anyone know if there is a kit (OEM or aftermarket) or technique to add a safety/kill/deadman's switch to a '78 Johnson 140HP on my 17' bass boat? It dawned on me today as I was WOT alone that it would be a good idea to have one. Thanks.

  2. #2
    Lieutenant Commander seabob4's Avatar
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    Weeki Wachee (home of the mermaids), FL
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    Default Re: Install Kill Switch?

    Your Johnson shuts down the motor by grounding the coils. Wire in a kill switch (Normally open) that will apply a ground to the coils when pulled. The ignition switch will open the ground loop when you are running, simply introduce the ground back in with the kill switch...

  3. #3
    Rear Admiral Fireman431's Avatar
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    Sep 2007
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    DeBary, Fl
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    4,109

    Default Re: Install Kill Switch?

    There is also an aftermarket kill switch that has the ignition wire from the key run to it.

    It is in normally closed loop mode with the cord intact and when removed, it opens the circuit, killing the engine. It's available online.
    2001 Carver Voyager 374 'Stick's Competition'

    Something tells me I should be on the water....

    If I answer your upholstery questions, it's only because I've been doing it 20+ years...

  4. #4
    Cadet
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    Jul 2010
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    Potomac Falls, VA
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    Default Re: Install Kill Switch?

    Thanks for the responses.

  5. #5
    Moderator Bob_VT's Avatar
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    May 2001
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    West Rutland, Vermont, United States
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    Default Re: Install Kill Switch?

    This is a great link to boat specifications http://boatspecs.iboats.com/
    Please, shop iboats first!!


  6. #6
    Lieutenant Junior Grade
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    Dec 2007
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    St Petersburg
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    1,195

    Default Re: Install Kill Switch?

    I am out a lot by myself on my boat. I never wore the lanyard. I bought an AUTOTETHER. It is a wireless lanyard. I actually use it.

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