Trolling Motor Power Loss on older (1985) Ranger

[Lugnut]

Hey Folks, Just wondering if anybody has dealt with this problem. I have a 1985 Ranger 370V, I am currently on my third trollingmotor over the last couple of years. It just seems that my trollingmotors don't have a ton of power except on high. I typically run a 67-70lb. thurst Motorguide and I have just replaced my trolling batteries as well as my on-board charger. Could it be the old wiring??? Just looking for some ideas if you have any. Thank You, Lugnut

 

[tashasdaddy]

Re: Trolling Motor Power Loss on older (1985) Ranger

wires get nicked, and being 20 years old the elements take their toll. insulation cracks. allowing moisture to get in. thus the wires deteriorate from the inside out. try running a temporary wire and see if it makes a difference. also are you running 6 guage wire.

 

[bruceb58]

Re: Trolling Motor Power Loss on older (1985) Ranger

Measure the voltage drop between your battery post and where it enters the motor. Do this on the negative lead as well.

 

[atticus3600s]

Re: Trolling Motor Power Loss on older (1985) Ranger

I would just redo all the trolling motor wiring with 4 gauge wire and replace all the plugs. This would limit voltage drop if the cables are long and will also keep you safer because the wires will not be so deteriorated as to be able to start a fire.
Also I think that your motor is 24 volt, are you sure that you have your batteries all hooked up right in series?

 

[Silvertip]

Re: Trolling Motor Power Loss on older (1985) Ranger

Start by making sure you have the wiring correct. 60 - 70# motors are typically 24V. "Series" and "parallel" wiring confuses people so make sure you have two batteries in SERIES for 24V operation. If you have them in parallel you are feed only 12V to a 24V motor and it will be a slug. There is no reason you should be going through motors like you are. My bet is incorrect wiring. Let us know your current setup. 12V, 24V, or combo 12/24V motor, separate 12/24 Switch panel on the boat, 12/24V switch on the motor, and number of wires on the trolling motor plug. Make sure you count wires, not just the terminals.