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Old 11-03-2015, 15:56   #1
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Join Date: Mar 2014
Location: Rocky Point, NY
Boat: Tanzer 27
Posts: 21
Yanmar gm10 key


Please forgive my newbie question. This is my first sailboat.

The ignition key switch on my yanmar is broken, when I put in the key the cylinder falls into the back of the ignition panel. What is the function of this key is it like a car where u put in the key and turn it like a car?
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Old 11-03-2015, 18:45   #2
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Join Date: Aug 2007
Location: West Indies
Boat: Burger 74' motor yacht, 65 foot 12 metre, Flicka and sailing dinghy
Posts: 635
Re: Yanmar gm10 key

You turn it to activate the start button and the gauges and to let the alternator charge the battery. On that motor, the manual says that if you turn off the key while the engine is running your alternator will not charge the battery.

Is the switch broken or just not fixed to the panel?
You can replace it with any marine keyswitch. Just re connect the wires the same way.

Why can't things remain where i carelessly left them?
To a hammer, everything looks like a nail.
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Old 13-03-2015, 09:33   #3
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Join Date: Feb 2013
Location: Sanibel FL
Boat: 1979 Bristol 35.5 CB
Posts: 981
Re: Yanmar gm10 key

There should be a nut that holds the guts against the face of the panel. Maybe avble to pick up a cheapie switch with plastic nut at the auto parts store and swap out the nut only. They seem pretty standard.
John Churchill Sanibel FL
NURDLE, 1979 Bristol 35.5 CB
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