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Thread: battery/big motor question

  1. #1
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    Default battery/big motor question

    What issues/concerns if any for using a 12volt side of a 24volt trolling motor battery setup as a starting battery for your big motor?
    The big motor is a 50hp Merc.
    Thank you for your help.

  2. #2
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    You do not want to discharge a series bank unequally. They will not equalize like in parallel, the weaker battery will discharge first, and be totally ruined if pushed too far. You also do not want to be in a situation where you've ran the batteries too low to crank the motor.

    A group 24 starting battery is not all that expensive or heavy, it is far better to have the motor on it's own power supply.
    Likes strmwalker, trypman1 LIKED above post

  3. #3
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    strmwalker is offline Crappie.com Legend * Crappie.com Supporter * Member Sponsor
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    Quote Originally Posted by Atimm693 View Post
    You do not want to discharge a series bank unequally. They will not equalize like in parallel, the weaker battery will discharge first, and be totally ruined if pushed too far. You also do not want to be in a situation where you've ran the batteries too low to crank the motor.

    A group 24 starting battery is not all that expensive or heavy, it is far better to have the motor on it's own power supply.

    "What if you woke up today with only the things you thanked God for yesterday"
    "Life without God is like an unsharpened pencil - it has no point. "AMEN"

  4. #4
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    Don't do it for many reasons.

  5. #5
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    Not a big deal for your setup. Your motor doesn't require a lot of power to start and it's charging system isn't that robust. It's a common battery setup for smaller rigs that run 24 volt trolling motors.
    I'd rather be fishing.

  6. #6
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    "A group 24 starting battery is not all that expensive or heavy, it is far better to have the motor on it's own power supply."
    I agree totally.

  7. #7
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    Donít do it.


    Sent from my iPad using Crappie.com Fishing mobile app

  8. #8
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    Thanks all, I will adhere to your thoughts/suggestions.
    Thank you.

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