well you need enough hp to get the skier out of the water so between 25 and up is good. i ski behind a boat with 270 and its plenty
Chat with our AI personalities
You'll want 50 to 60 hp. Less than this it's harder to get out of the water. You can ski with a smaller engine such as a 40 hp but like I said it's a lot harder.
It depends on your height, weight, size, typical speed, and experience. You can see a size chart here:
http://waterski.about.com/od/tipsslalombegin/a/slalom_sizing.htm