Switch for trolling motor source?

[random_guy]

Hey folks,

I live in a subdivision with two lakes. One of the lakes is electric trolling motor only. So we have been out cruising before and then found ourselves with a dead battery, so I had to move the trolling motor connections over to my crank battery for my gas engine. I looked into getting an on-off-on switch so that I could just throw a switch instead of having to break all the connections if this ever happened again. I got a switch and rigged this up two seasons ago. It worked great. Now for some reason this season when I have this system hooked up, the engine will not start. I have taken the switch out and tested it with a meter and it functions exactly as it should. The system worked great for two seasons, and now will not work. What am I missing? I thought that for some reason the engine might not light like the two grounds of the batteries being connected. So I disconnected the two hot wires and just had the two grounds of the two batteries connected to test and the the engine starts just fine. But when I have the hots connected, regardless of what position the switch is in, even off, the engine will not start. Thoughts on this?

Thanks

 

[dingbat]

I suspect your charger is the problem.

Both batteries fully charged?
Dual bank charger?

Lift the charger off one battery to see what happens

 

[random_guy]

I suspect your charger is the problem.

Both batteries fully charged?
Dual bank charger?

Lift the charger off one battery to see what happens

Yes, it’s a dual bank MK charger. It was there the previous two years also, but I’ll give that a shot. Thanks for the thought,