Excellent excuse to buy a bigger boat!

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Posted by Chriscase [76.224.240.230] on Friday, April 02, 2010 at 00:49:46 :

In Reply to: OT electrical question need experts! posted by David [76.103.64.254] on Thursday, April 01, 2010 at 23:52:12 :

Something with twin diesels would probably be 24v!

Or return the pump for a 12v.

Otherwise, it takes 3-4 starter solenoids, and a spdt switch. You'd need to be able to isolate the ground of battery #2, use the relays to reverse it's polarity when the switch is in the opposite position,, then switch back to make it parallel to battery #1 for usual operation.

I did it once 35 years ago to run an aircraft starter motor as a winch on a 1/2t Dodge WC Panel. It worked.

Follow Ups:

Re: Excellent excuse to buy a bigger boat! - mannyc 11:32:04 04/02/2010

Re: Excellent excuse to buy a bigger boat! - David 00:07:07 04/03/2010
I always like the idea of a centrifical pump on the driveshaft - Chriscase 15:01:27 04/02/2010

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