Re: Selecting a replacement Prop
I used to go thru an aluminum prop per year on my inboard outboards. When I switched to stainless, I got 10 years without a scratch--until the engine blew. In the long run, a stainless prop can be a great value.
Getting back to props: If you have a good prop shop around, go shopping there. His advice will be free if you buy from him, and he may allow you to return the prop if it's the wrong one for your boat.
I would think for general running, a 21 pitch 3 blade would be your best prop. I always had a 2" lower pitch prop I'd install for the day if pulling heavier skiers.