After a hiatus for other projects since launch, I'm back at this little conversion exercise.
Started working on a "test" coupler (wood). That's my style.
I brought the motor down to the boat this evening, expect I'll make up a quick bracket/platform (wood also) and try it out before the end of the day tomorrow.
6v test first, jumper cable "contactors". Progressing in 6v increments to 24v or wooden coupler failure, whichever comes first.