So I bought this little 1.5 hp motor called a Cruise n' Carry (made by Shindaiwa) at a garage sale. It advertises itself as being less than 12lbs., and is air-cooled and looks remarkably like my other little air-cooled motor, a Sears Gamefisher (made by Tanaka). Anyway, I was doing some research, and someone on a forum noted that Shindaiwa also makes weed whackers, and commented on the fact that there wasn't much difference. That's when my mind started working, and I looked out in the yard at my Stihl weed whacker and wondered why a person couldn't make a pivoting yoke to hook a weed whacker to a transom, make a tiller with a throttle control, and replace the cutter end with a propeller and rudder/keel of some kind. Just a thought.
BTW, I might part with this little motor as I like the Sears better. I might trade it for an electric troller also as many of our lakes are restricted to them.