I have always had Mercury kickers. 8, then 9.9 and then 15HP 2 strokes. The last 2 boats have had 9.9 4 strokes. I found the 4 strokes to be very cold blooded. On my last boat, a 22' V8 inboard jet, I had a 9.9 bigfoot. Wide open it would push the boat 5 mph. When I was looking for a new...