BB
In order to get best image for side view your boat should be traveling approx 3-6 mph and in the straightest line possible. Mounting on trolling motor certainly is possible but the turning of head will not give you the clearest image.
Most operate from console with transducer mounted on transom marking structure, fish, etc. creating waypoints and then have front unit networked with rear using the front to return to those areas. Then switching to down imaging.
Get the Gen 3N unit.
You cannot upgrade the Gen 2 to be the the standards of Gen 3 units.
Hope this helps.
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