trolling motor wiring question

Kevenater

Recruit
Joined
May 26, 2008
Messages
2
I had to swap my trolling batt saturday after running down my cranking batt. I'm not sure I hooked them back up properly. it's a hand controlled digital motorguide. 24 volt. I have two red cables and two black cables. when i look on the motorguide site at the diagram they only show one red and one black on the 24 volt diagram....if i remember correctly mine had a red and a black going to batt 1 and a red and a black going to batt 2 with a jumper going from positive on one batt to the neg on the other batt. thats how I hooked it back up. afterwards when i'd get over half power it would slow down, I know one of the trolling batts was almost dead because I had tried to start the engine with it and it wouldnt turn it over so i had to use the other trolling batt. maybe that's why it kicked down the prop speed. hope this all makes sense. out of the water the prop turned at full speed with no load on it. any help is greatly appreciated!!! thanks
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: trolling motor wiring question

You have it wired correctly. The 24V wiring you looked at on the MotorGuide site was for a 24V ONLY setup. Your boat is wired for 12 AND 24V even if you only use the 24V capability. In a 24V system if one battery is nearly dead you cannot get full power from the motor. Yes, the motor will seem to spin fast out of the water but with a load on it the batteries don't have enough power due to the one dead battery.
 
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