Welcome aboard Lou,

My 6hp Tohatsu fits just fine laying on it's side (as long as it is tiller side down).

I do find that the 20" shaft (really more like 22") is about that I would care to try to stow. It goes in prop first, and then the powerhead will clear. I would not recommend the 25" (extra long) shaft option as I doubt that would stow.

That said, I have also dropped my 3hp Johnson (the little twin) in the well. We carried it for the dingy, but it would move my Ariel.... not winning any drag races with it though. Much easier to lift and stow, but probably not suited to cruising.