Recommended
I beleave the largest recommended is 10 HP. I have a 9.8 HP 2-cycle and it seems to move the boat along nicely ( almost hull speed, slack tide and no wind). The 2 cycle lets me lay the motor down in any position without leaking oil I remove it for trailering because I have already replaced the motor mounts with heaver ones and don't want to do that again. My understanding is that 4-cycles are heaver but the wieght difference between 10 HP and even 15 HP isn't that great, but that you can't lay the engine down on its either side because of the oil pan leaking or oil getting into the heads. Hope this helps. Baums Rush 1999 Hunter 260