[Riverratt]

For the boat and engine size you are looking at the choice will be a Mercruiser Alpha One or a Volvo Penta SX outdrive. The SX drive is much better then the Alpha. The SX drive has a cone clutch vs. a dog clutch for the Alpha. The cone clutch will shift much smoother. Also the Alpha has the seawater pump in the outdrive whereas the SX has it mounted on the engine. much easier to service the engine mounted pump. Either drive will provide years of dependable service.