Does that OB have a reverse gear? Apologies if it's a silly question, still plowing through my research...You want a long shaft
I highly recommend the Tohatsu 6HP SailPro.
It comes in long (20”) or extra long(25”). It has a high thrust prop and gear ratio and an alternator to top off the batteries. I have one on my hunter 26 and i like it better better than the Honda 9.9 I used to have on the boat.