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Old 05-01-2013
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Dog Ship Dog Ship is offline
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Re: Electrical kill switch

My first question would be is, "What gets turned on and off with this kill switch?" If all it does is duplicate what the battery selector switch does when it's off then yes the "kill switch" is redundent.
Keep in mind that by shutting off this kill switch while the engine is running could also destroy your alternator.
Our boat was upgraded from two batteries to three when the new engine went in. My two house batteries are on the battery selector switch and I have a separetly wired dedicated engine battery.
The only thing I don't like about my set up is you can start the engine with the battery selector switch in it's off position.
It would be nice to have a night switch/kill switch somewhere so I can shut off the engines battery from inside the boat somewhere. Not being able to start the boats engine so easily would make it a little more secure.
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