I have two questions regarding transom mount trolling motors.
1. I know I do not want to hook the transom mount to my starting battery as my graphs are connected there. Am I better off hooking the transom mount to the bow with a pair of grp27 hooked in parallel along with the bow mount? or having a dedicated battery in the back.
2. I’ve decided that a 55# thrust is about perfect for my bow. Do I need the same in the back, or could I go lighter?
As far as batteries goes, more is usually better. If you have the room for a 4th battery, and don’t mind the extra weight, add another for the transom TM.
But, what I would do is wire the transom TM to the (pair) of 27’s, the transom TM to one battery, the bow-mount to the other, and add a simple cut-off switch in the positive jumper lead between the batteries.
This way, depending on your needs, you could have the 2-battery set-up for either TM, run either TM off a single battery, and/or be able to charge the batteries independantly.
Not sure on your boat size, but I use a 55# transom TM on my 1650 Lund, and feel that it’s the perfect size, for what I do.
HRG
I run a 16′ alumacraft tiller. On the front I have a 55lbs with a grp27 12v system. On the back I also have a 12v 55lbs with a grp27 battery and two graphs hooked up batteries will last me ALL day.
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