skiing will be very hard to acomplish with a boat that size, specially because of the outboard size you'll be able to use.

Kneeboarding will be quite possible if you don't expect a lot from it and get the largest possible outboard your boat will support.

these boats have a lot of drag and are very sensitive to weight and load distribution.

Once you get it, you'll be amazed at its performance when boating alone compared to a couple of passengers, an ice chest and some sandwiches and fries.

Good luck

How about a 30 HP two-stroke on a 13 foot boat?

check the manufacturer specs to see if the boat will support the weight of the boat as well as the HP.

Yes it is a Zodiac deep V hull rated for 30HP