I am known for my knowledge of the 26, 260, 19, 240 and 23.5.
I would suggest the long shaft or 20 inch shaft if you are on an inland lake. If sailing in the oceanl, you may want to consider a 25 inch shaft in following seas. With the 25 inch long shaft, you have to be real careful to tilt it when pulling the boat out of the water on the trailer.
Get one that is electric start and for easy of attachement, use trolling motor plugs for easy disconnect.
TOhatsu also makes Nissan and Mercury small outboards which many do not know that little tidbit.
Crazy Dave Condon