The side scans will work on the trolling motor but are better designed mounted to the transom. The reason behind this is you need to be moving for the si to work the best. But any turning of the head on the trolling motor will distort the picture. This is why they recommend on the transom. I have one but not put in the water yet, to cold and icy. For the best information check on the yahoo group sideimaging. Are the worth the money to me yes, they will allow you to learn alot more about the lake than any other type of depth finder.
Ted
Neither snow nor rain nor heat nor gloom of night will keep me from crappie fishing!
2010 Lake of the Ozarks Super Slab Champion