Fisherman1850,
Yes as Jolly Roger pointed out. But there are quite a few members who have SI on the trolling motor. Since the SI transducer on the transome is a good 25-20' from the bow where you are fishing, the info you will be seeing is behind you. By putting it on the trolling motor, you can see the fish that are near your postion.
So, in my opinion, you would want it!
Hope this helps, and look forward to seeing some picts!
Robert