How can I keep my trolling motor from interfering with my HB 1199 graph on front deck. Every time I hit the trolling motor my graph goes crazy. Go back to reading right when I let off the motor. Any advice much appreciated
It could be any number of things causing RFI on your unit. My issue was water intrusion into the motor housing that caused corrosion to the internal wiring. You'll just have to start trying different things until you locate the reason for the RFI.
Watch this video at about the 5:44 mark. This may help too and it’s a simple fix if it works on yours. I know it has for some. https://youtu.be/Ik9FtLECfVc