I'm picking this as your "primary" post, rather than responding to the double post.
Tohatsu makes a 9.8 with a 25" shaft, alternator, and electric start. I had one on my Catalina 25 and it is a good engine. I suggest getting a 2011 or newer when they switched to the high thrust 4 blade prop by default on the 25" prop shaft. This is the engine:
Tohatsu 9.8hp Four-Stroke Outboard Model # MFS9.8A3EFUL
I agree that a 25" prop shaft is a good idea on a 25' boat.
We got pretty good fuel economy with this engine (about third to half a gallon per hour cruising at just under hull speed). Not as good as a diesel inboard, but not too bad.