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NEBRVET

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I changed out my trolling motor. I went from a 12/24 unit to a strictly 24 volt unit. I rewired the batteries so they are now in series giving me the needed 24 volts. I get about 4 hours of run time. My question is about the on board charger. Am I getting a full charge? The lights for one of the batteries always shows yellow. I've had the batteries tested and they are good.
 

Cub48

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Check voltage while the chargers on should be 13.5 Volts or more while charging if you don't have a volt meter switch leads on the batteries and see if the same battery stays yellow or if it switches you may have a bad charger. if it stays on same battery i would put battery on.
 

Tim_C

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Are you using a 2 bank 12 v charger? If so, even though the batteries are connected in series to send 24V to the trolling motor, each battery should be connect to a one bank of a 12V charger.

Only 4 hours of run time seems way too low. Is that 4 hours at 100% power? If so that may be true. What size batteries and type batteries are you using? That is a major factor in run time.
 

NEBRVET

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Tim C and Cub48. Thanks. I'll have to check it out and see what type, size I have and if I am getting the required charge. Appreciate the advice.
 

Ken Reed

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I changed out my trolling motor. I went from a 12/24 unit to a strictly 24 volt unit. I rewired the batteries so they are now in series giving me the needed 24 volts. I get about 4 hours of run time. My question is about the on board charger. Am I getting a full charge? The lights for one of the batteries always shows yellow. I've had the batteries tested and they are good.
i have a 24 v motor on my 2019 z18 i can run around 2 days on a single charge.
 

Ken Reed

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sounds like a wire issue, disconnect the battery cables and check the wires and end lug connection for good crimp.
 

jerry shack

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Cub48 is right first thing is output of the charger. Then that's eliminated . Batteries check ok (sometimes that's not conclusive) . Then the plug, with 24v you will need a good plug like the 3 prong push and turn type. Then with a volt meter with the trolling motor on high (preferably under a load) check the voltage at both batteries. If one of the batteries voltage drops more then the other its the battery.
 

Kirby Wilson

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After you have done Jerry Shack and Cub48 recommendations.
Check your batteries with a voltage charger. Then check battery changer with a voltage meter. It should run 1 to 3 volts higher when the charger is on depending on the batteries charge.
What amp per battery is your charger. Most batteries require a minim of 10 amps per battery. If not a 10 amp charger would recommend charging your batteries on a manual 10 amp charger a few times a year.
Is the battery charger a smart charger then it may not recharger your batteries to a full charge. Recommend charging your batteries on a manual 10 amp charger twice a year.
 

NEBRVET

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My thanks to all. I've got a Minn Kota 210 on board charger. I get a 'check connection' light on the front (1st) battery. I switch the wires from the 2nd battery and still get a 'check connection' light on the first battery. All indicators point to a bad battery. Although I had it tested on the spring and it registered good.
 

NEBRVET

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It is a bad charger. I had both batteries checked again and they tested good once they were charged up.
 

Cub48

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Check for a fuse at the wire where it connects to the battery might be that fuse.
 

NEBRVET

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I checked all 4 fuses with a multimeter and cleaned the connections. No change.
 

FastZ8

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I had the same thing happen to mine a year ago and did everything that all of you had suggested and found out that it was my charger. Hope that helps.
 

NEBRVET

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Not to plug a business but I snagged a new Minn Kota 315D for $170. Nice little upgrade at a good price.
 

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