Thread: boat batteries
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Default boat batteries

"mark" wrote in message
i/o motor 250 hp my master switch is on both or either and still
nothing at all. no ratio or lights or anything

Disconnect the batteries until you find the problem.

Now I assume you have a Mercruiser or one of the clones thereof. Somewhere
on the rear top of the engine there should be a big red circuit breaker -
looks like a big red button if I recall. Push it in, hook your batteries
back up and see what happens.