I’ve got a problem that just started on my last two trips out. When I put down my trolling motor, it messes up my sonar screen. The normal white with orange images turn to blues and blacks. It’s almost like a negative. I can still see some of the images but it’s all dark. As soon as I pull the trolling motor up, it goes back to normal. The first time it happened, I thought that it was a low battery problem. I was only reading about 9 volts. But yesterday, my batteries showed a good charge at 12.5 volts. I usually charge them the day before I go out. I have two deep cycle batteries hooked in parallel, and the only things I run are my trolling motor, live well, and my GPS/sonar. Yesterday, I didn’t have the live well. Oh, and the GPS is never affected.
I’ve had this boat(16’ alum. jon boat, 40hp Evinrude) for 4 years with the same set up, with no problems.
Any ideas?
Thanks, Bob
Bob Van Gundy
Marine Designs,Inc.
Custom Aluminum Fabrication
803-727-4069