What is the minimum horsepower of the engine in a Personal Water Craft?

Well, to answer your question it is kind of difficult. The older the ski, the less horsepower its going to get compared to the new 2008 models. Today skis go up to 255hp stock, and I have friends who have every part to mod the 2008 ski over a 425hp. I do not believe there is a "minimum".

If you could, explain a little more.

Are you looking for a ski that is slow?

Are you looking for a nice ski that's slow

A family ski..

or what?