I hope someone can steer me in the right direction to fix this problem. At the beginning of a fishing trip TM seems to have plenty of power. (Motor Guide, not sure about thrust). As the trip goes on thrust seems to get less and less. Sounds like batteries (24 volt system) are running down. I have an onboard charger and I recharge after each trip as soon as I get home.

Today I did a load test on both batteries individually and each are still showing good abiet close to the yellow area. When I hooked the negative ground back up after the test, there was a spark. Seems like I read somewhere that a spark when hooking up a battery indicates a short somewhere, but not sure.

One TM battery is a Bass Pro brand and the other came from Wally world.

Any help would be appreciated.

Trihull