D
Dick of Sylvan
My old Honda 4-stroke 100 (9.9hp?)w/long shaft is wonderful for cruising, though a bit heavy when mounting and unmounting, and probably reduces max sailing speed a tad. For all around use, about a 7.5 long-shaft may be ideal. Just a note, if you ever intend to race in a Catalina regatta, their national rules call for at least a 4hp w/combined motor and tank weight of at least 40 lbs.