Location: Green Bay, WI | 5th lake Brad - 11/10/2014 5:23 PM
He would be all set, only if the wire originally run in the boat was the correct gauge to handle a 24v system. If it was a 12v system it's probably not. 6ga is what you need and is instructed by minn kota to uphold warranty.
I would bet he'd be just fine, as the current in a 24-volt system may well be lower than that in a 12-volt system.
That being said, a guy should by all means check the specs on the 24-volt trolling motor, simply to see how much current it draws. If the 24-volt motor draws more current, then you're right that he would need to verify that the existing wire is large enough to safely carry that load. Reviewing the manuals for each trolling motor should show these ratings pretty quickly.
EDIT: I found a thread on TheHullTruth's forum, showing a "rule-of-thumb" for how much current the various trolling motors should draw:
http://www.thehulltruth.com/carolinas/485565-trolling-motor-minn-ko...
There isn't as much difference as I initially expected: 1.2 amps per pound of thrust for 12-volt motor, versus 0.9 amps per pound for 24-volt. So if this is accurate, then you may indeed need heavier wire, depending upon the rating of the motor you're replacing, and that of the new one. So these need to be checked, as I (and Brad) have noted above.
Edited by tcbetka 11/10/2014 8:34 PM
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