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#11098891 - 09/12/15 06:29 PM Battery Switch..question
Lee in Texas Offline
TFF Celebrity

Registered: 03/23/13
Posts: 8946
Loc: Wise County Texas
Is it worth the money to buy and install a switch just in case the main engine starting battery ever fails to start, to switch over to one of the trolling motor batteries?
Just curious ...
Thanks in advance
God Bless
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#11098903 - 09/12/15 06:34 PM Re: Battery Switch..question [Re: Lee in Texas]
Bobby Milam Offline
Extreme Angler

Registered: 07/13/14
Posts: 1998
Loc: Arlington
Or just carry jumper cables then you can jump off of someone elses boat also

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#11099315 - 09/12/15 09:17 PM Re: Battery Switch..question [Re: Lee in Texas]
smooth move Online   content
Pro Angler

Registered: 10/14/12
Posts: 882
Loc: bayou vista,tx
i made a set of jumper cables just for that. used #8 wire and alligator clamps. about 10' long, reach from my trolling motor batteries to the crank battery. haven't had to use them yet, but i've got em if i need em!
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#11099482 - 09/12/15 10:05 PM Re: Battery Switch..question [Re: Lee in Texas]
Bob Landry Offline
Extreme Angler

Registered: 08/10/11
Posts: 2037
Loc: Austin, Tx
A battery switch that will connect the positive terminals of your batteries is worthwhile. A jumper cable will work, but the switch eliminates clutter. You may not always have access to another boater to help you out.
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#11099690 - 09/13/15 04:42 AM Re: Battery Switch..question [Re: Lee in Texas]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 10530
Loc: Littlefield Tx & Lake A. H. US...
Will not work because the trolling motor battery`s and the cranking battery uses a separate ground. You would have mount 2 separate switch`s. Just a suggestion keep the jumper cables in a water proof container. I don`t know how many times I have seen booster cables that look like they have been laying on the bottom of the lake. Useless.
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#11099691 - 09/13/15 04:51 AM Re: Battery Switch..question [Re: Lee in Texas]
Lee in Texas Offline
TFF Celebrity

Registered: 03/23/13
Posts: 8946
Loc: Wise County Texas
Thanks....guess I'll look around for an inexpensive set of cables and jumbo zip lock baggie
God Bless
_________________________
http://www.finfeatherresort.com/index.asp - Best Folks on Toledo Bend !!!
http://www.markpacklakefork.com/ - Great Source!!
http://bassclubofthewest.angelfire.com/ -West Ft Worth Bass Club
http://www.gleasonfishing.com/ Darold Gleason
2004 Stratos Complete Restoration 2014!!! With Much Gratitude to:
Cal's Marine/Azle,Texas (817)300-2827

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#11099757 - 09/13/15 07:11 AM Re: Battery Switch..question [Re: gary purdy]
Bob Landry Offline
Extreme Angler

Registered: 08/10/11
Posts: 2037
Loc: Austin, Tx
Originally Posted By: gary purdy
Will not work because the trolling motor battery`s and the cranking battery uses a separate ground. You would have mount 2 separate switch`s. Just a suggestion keep the jumper cables in a water proof container. I don`t know how many times I have seen booster cables that look like they have been laying on the bottom of the lake. Useless.


Why can't you connect the starting battery to the first trolling motor battery in a 24V or a 36V string? I have a 24V system and my lights and electronics are running off the positive post on the first battery which provides 12V and shares a common ground with the starting battery.

Which brings me to another question. Is there a reason to not have the starting battery and the one supplying 12V to the boat's systems on the same ground? When had a 12V TM, I installed a Blue Sea ACR and the installation diagram showed the starting and "house" battery using a common ground. That should be OK with my current system as long as it's the 12V sources sharing the ground.
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#11100949 - 09/13/15 06:33 PM Re: Battery Switch..question [Re: Lee in Texas]
Bobby Milam Offline
Extreme Angler

Registered: 07/13/14
Posts: 1998
Loc: Arlington
Originally Posted By: Lee in Texas
Thanks....guess I'll look around for an inexpensive set of cables and jumbo zip lock baggie
God Bless


Don't go too cheap. The really cheap ones have small wires and don't do so well jumping. If you've ever jumped a car with them, remember how long you had to wait for them to get enough of a charge through to crank the engine? Put a small wire brush in there to clean them for a good connection.

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#11102594 - 09/14/15 09:08 AM Re: Battery Switch..question [Re: Bob Landry]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 10530
Loc: Littlefield Tx & Lake A. H. US...
Seen that tryed years ago Bob and if you connect a another battery into a 24v system that jumps 24v at the battery`s it will act like a welder when you connect the cranking battery + & - to one of the trolling motor battery`s. Yes you can draw 12 volts from one battery in a 24 or 36v system.
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#11103648 - 09/14/15 06:20 PM Re: Battery Switch..question [Re: Lee in Texas]
Bob Landry Offline
Extreme Angler

Registered: 08/10/11
Posts: 2037
Loc: Austin, Tx
I'm talking about connecting the start battery pos post with the pos post on the 12V battery, not the pos post that supplies 24 volts to the trolling motor.
_________________________
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Helix 12 CHIRP SI, HB 1199, MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic

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#11108892 - 09/17/15 05:07 AM Re: Battery Switch..question [Re: Bob Landry]
hopalong Online   content
Super Freak

Registered: 09/06/08
Posts: 74395
Loc: manager, drake river ranch (fo...
Originally Posted By: Bob Landry
I'm talking about connecting the start battery pos post with the pos post on the 12V battery, not the pos post that supplies 24 volts to the trolling motor.



to safely jump from a 24 volt system you need to disconnect the jumper wire from the 24 volt then hook up to one battery for the jump.
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#11108908 - 09/17/15 05:40 AM Re: Battery Switch..question [Re: Lee in Texas]
Lee in Texas Offline
TFF Celebrity

Registered: 03/23/13
Posts: 8946
Loc: Wise County Texas
Morning, all good points but, back to original question: Is there no one who has installed or uses a 'switch' from main battery to one of the 24V TM batteries ?
Doesn't sound like it ...
God Bless
_________________________
http://www.finfeatherresort.com/index.asp - Best Folks on Toledo Bend !!!
http://www.markpacklakefork.com/ - Great Source!!
http://bassclubofthewest.angelfire.com/ -West Ft Worth Bass Club
http://www.gleasonfishing.com/ Darold Gleason
2004 Stratos Complete Restoration 2014!!! With Much Gratitude to:
Cal's Marine/Azle,Texas (817)300-2827

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