Take you all summer just to get the thing in useable condition. You reckon the sails are OK , what about standing and running rigging ? Everything new down below. even the freaking cockpit locker covers are gone. Then you'd have to go out and buy an outboard ? Sounds horrifying to me but I'd like to see what the accomodation is like.
Outboard raised , as you say probably sail better than the Slug. I cannot find anything about a "SeaWitch" as such. That spelling correct ?
If the SLugs engine problems are now down to the mounts and the rest of the donk is OK, then fix 'em and be done with. Mind you four stroke outboards are verra quiet.
"Do you think God gets stoned? I think so... Look at the platypus." Robin Williams.