I recently bought a Minnkota Powerdrive V2 with Ipilot. My previous trolling motor was a Minnkota All Terrain with my humminbird 788ci HD di transducer mounted to it. The fish finder worked great on the old trolling motor, but not on the new. I get a bunch of interference with the new motor running unless it is on the very highest speed. I went through all of humminbird's suggestions to eliminate electrical interference (rerouted wiring, added a ground, bought a new battery to run the fish finder by itself). None of that worked so I uninstalled everything except the transducer mounted to the motor. I wired the fish finder to battery sitting on the workbench in my garage so the only part near the trolling motor was the transducer and mount. I turned on the trolling motor and still had interference. next, I took the transducer and mount off of the motor and the interference stopped. If I touch the running trolling motor with any part of the transducer or mount, the interference shows up. The interference must be coming from noise/vibration from the motor. I layed a piece of neoprene on the motor and pressed the mount to it and it slightly decreased the interference but not significantly. Does anyone have any suggestions?
