Has anyone else had problems with this? When I run my trolling motor (mounted on the bow) I pickup interfernce in the 997 transducer (mounting on stern). I did not have this problem until I mounted the new trolling motor. I have what looks to show waves on the picture when the trolling motor is running but they go away when I turn the trolling motor off. This only started when I replaced my MK Powerdrive with the MK Terrova.