I have a Garmin Force trolling motor so it comes with a transducer mounted on the motor. Over 95% of my fishing is on an electric only lake. As long as you are not doing a lot of turning the Side imaging is pretty good. As posted about trying to look at side imagining when using spot lock is useless.

Prior to the Force I had a Motorguide Xi5. I tried mounting a Garmin GT54 transducer on it, I had all kind of interference whenever I got above about half speed on the trolling motor. The motor was about 5 years old, don't know if that had any effect on causing the interference or not.