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Author Topic:   Wiring Relocated Battery
BarneyC posted 08-12-2009 08:54 AM ET (US)   Profile for BarneyC   Send Email to BarneyC  
I have an 1986 Boston Whaler Montauk with an 1986 Evinrude 90 and am in the process of relocating the battery from the stern to the console. I plan on using 2-AWG wire through the tunnel and will either use an on/off switch or a two-battery switch. Dealing with the positive side of the circuit seems straightforward. How to propely connect the negative side is not clear to me. Do I connect the negative cable from the battery to the negative cable from the engine, and if so, how? The consensus is not to butt splice them. Should I use some sort of terminal block? Bolt the lugs together and use heat shrink? Do I run the new negative cable directly to the engine? If this is the case it looks like getting 2-AWG through the wiring port on the motor might be a challenge. What's the best way?

Thanks!

Barney

jimh posted 08-12-2009 09:18 AM ET (US)     Profile for jimh  Send Email to jimh     
To move the engine starting battery to the console from the transom of your small center console boat:

--install two large terminal posts in the transom area of the boat, one for the positive cable and one for the negative cable

--connect the original primary battery cables from the motor to these terminal posts

--run your new 2-AWG extension cables from the terminal posts in the transom area, through the rigging tunnel, to the console

--in the console the negative cable will connect to the battery negative terminal. The positive cable will connect to your switch.

--to prevent the terminal posts in the transom area from being subject to water or spray, you will have to mount them as high as possible on the hull bulwarks, close to the gunwale.

Blackduck posted 08-12-2009 09:22 AM ET (US)     Profile for Blackduck  Send Email to Blackduck     
Leave your engine cables the way they are and make your junctions in the stern using a power post, like a Blue Sea PN 2018.
jimh posted 08-12-2009 09:23 AM ET (US)     Profile for jimh  Send Email to jimh     
Also:

--add a protective cover to the terminal posts. These are often available as accessories for terminal posts. This will prevent the posts from being a hazard to other cables or to people.

--after the connections at the terminal posts have been made and tested, paint the connections with liquid neoprene rubber (or liquid electrical tape) to protect them from corrosion and water intrusion.

See this Blues Seas catalogue page for some ideas:

http://bluesea.com/category/9/38

BarneyC posted 08-12-2009 09:34 AM ET (US)     Profile for BarneyC  Send Email to BarneyC     
Thank you! This is the answer I knew must be there somewhere!

Ragards,

Barney

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