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Thread: battery hook ups question .

  1. #1
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    Default battery hook ups question .

    Right now my boat set up with starting battery running everything (starting outboard motor , pumps , lights , 2 - big 10'' Humminbirds ). Trolling motor 24 volt on it's own 2 batteries . After a while one of by 10'' birds goes off when I start outboard .
    Now the question . Would it be alright to start off one of the 12 volt batteries ( 2 LINKED FOR 24 VOLT ) that are running troller or should I install a battery just to start the out board .I would leave 3rd battery for Humminbirds , pumps , lights . 4 batteries is a lot of weight . I think as long as just hooked to one of the pair for troller it should not hurt but thought I should ask . May add 4th battery later any way if I start running 3 big Humminbirds .
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    Not sure if this is your same problem but mine was doing the same so I hard wired the 10” bird straight to the battery problem solved ! Added a fuse of course Also I went from 24v to 36 v trolling motor . adding the xtra battery only cost me about 3 mph . I have 18.6 xpress.

  3. #3
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    You can do that and should only be a problem if you run trolling batteries pretty low. Not knowing what motor you have, low voltage might affect fuel pump on newer high horsepower outboard. I'd give it a try. Then when you can buy you a large deep cycle battery and replace your cranking battery with it. Do you have the bird that dies direct wired to cranking battery? If not run seperate wiring straight to battery.
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    What Cray said.

    Remember, as the batteries age (chemical process) it capacity deteriorates. Over time, I would expect to see the dimming or shutdown of electrical/electronic devices with an older crank battery assuming the crank battery is the power source for electrical/electronics devices.
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    Thanks I run a big deep cycle to power everything in addition to the pair running my trolling motor . Gonna try cranking off one of the pair of deep cycles running 24 volt troller . Thank you all .
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  6. #6
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    Here is something else you need to check while your doing this. Check any connection on the power and ground for that unit especially where you may have a crimp connection.
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    My 4th battery is a 12v, 35AH wheelchair AGM battery. Runs 2 hummers, live well and lights when needed. Is fairly compact . Look for UB1235.
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  8. #8
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    You can run off of one side of the 24v battery's but in doing this you may still have the same problems when running your trolling motor on the higher settings. They pull a lot of amps.

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