Thanks for the info laker 1. You've got a good son looking out for you. I run Sea Foam through all power sports motors. So far so good. Definitely going long or extra long shaft. There's quite a few reasonably priced 8 and 9.9 4 strokes kicking around. I liked Rolmops suggestion of a 35 HP bracket. My steering is controlled by a Ray Marine autopilot so may I will just lock it in straight without connecting the kicker to the stern drive.