Welcome to iboats! That will more then enough power for skiing and yes the skier will be able to pull on the boat but there are factors involved. It will be fine for recreational skiing but I would hesitate using it for competing. There has to be a good driver and a good skier but, fun can be had and 140 HP will get just about anyone out of the water on one ski........a lot depends on experience. My deck boat is horrible at getting up on plane but will pull a skier.