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Author Topic:   Console Batery Wiring Details
kamml posted 01-26-2002 08:04 PM ET (US)   Profile for kamml   Send Email to kamml  
I am considering moving the battery in my Montauk to the console to reduce aft weight. What size wire to you run between the OB and the battery? Would you run the new cable direct from the OB connection or run to an aft bus block and then into the tunnel forward to the battery? I asked my OB installer to run the cable to the console but was told that a long run of cable was bad for the alternator. Ken
dfmcintyre posted 01-26-2002 10:00 PM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
Ken -

I can't recall what sized wire I've used, but it was the same size as what came off the motor to the battery. I've wired it two ways:

Cutting off the terminals, adding wire to the end, and making _sure_ that the splice was waterproof, as the splice went into the wire tunnel.

Making the splice up in the engine compartment, and a continual lead from the negative up the tunnel.

I felt the second way, eliminated any chance of water problems being introduced.

Additional note: Make sure that you cut through the console floor, and mount the batter on the deck floor. It's too heavy to just mount on the console floor. BTDT.

Another poster, earlier mention that they felt that the additional corrosion in the console (like the undersides of the instruments) was due to the outgassing of the battery, and the gas was not dispersed. I may take and silicone some flexable rubber tubing up to a small vent mounted on one of the vertical sides of the console.


dfmcintyre posted 01-26-2002 10:02 PM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
And regarding the "long cable being bad for the alternator".... ask him how much of the light aircraft fleet handles it, since many of the aircraft have their batteries mounted in the tail....


lhg posted 01-28-2002 05:37 PM ET (US)     Profile for lhg    
Check how this is done in a recent Montauk.
I can tell you, from my observation, the wires from the terminal block to the console are heavier gauge than the engine supplied batt cables.
kamml posted 01-28-2002 06:44 PM ET (US)     Profile for kamml  Send Email to kamml     
Thanks for the advice. The cables from the motor I think are 16, or maybe 6 gauge, 6 something. I agree the longer run probably needs a larger diameter cable. Looking at the motor the other night it didn't look too difficult to just run longer cables, possibly about 12' or so up under the console. My old Montauk has the vented doors, so I don't think offgassing will be a problem. I can see the new Montauk with the sealed locking doors that would be a problem, possibly an explosion hazard as well. Ken
stinkyB posted 01-29-2002 08:14 PM ET (US)     Profile for stinkyB  Send Email to stinkyB     
I'm in the process of moving the battery into the console as well. (it's not an original whaler console though) I bought 12' new cable (6 gauge?) Sorry I don't know the exact #, but it's about twice the thickness of the original to compensate for the extra distance. I ran the + & - through a plastic sleeve (took awhile to get them through without a snake) and will run it through the center tube this weekend (didn't finish last weekend, watched football). What is everyone else's thought of having the battery right by the gas tank? My father wasn't to keen on the idea, but this will save lots of space, & make it easier to wire some electronics.
triblet posted 01-29-2002 10:58 PM ET (US)     Profile for triblet  Send Email to triblet     
It's sure not 16 guage. That's WAY too

The newer (plastic) doors have vents. And
there's lots of other places for gas to get
out. It's not exactly a submarine conning


FISHNFF posted 01-30-2002 01:29 AM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
I have two Group 24 batteried inside my console along with a 11 Gallon gas tank (old Tempo 9GAS holds 11 exactly). I keep the rear door open. The tank is left rear. Battery #1 is left front crossways separated by a 1x12. Battery #2 is right front longways with tools and registration in waterproof container right rear. Tank filled through rear door. Whew! Tight but very functional.

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