I hate to bring a negative thread back to the top when a simple phone call would have answered your question Brett.
If you remember, you called and said you wanted to send an impeller in for a repitch. It got here, rock damaged (not destroyed, but in need of repair), the blades were off, and the diameter was .050" small. Our repair prices are on our site, and have not changed in years. It needed welding and remachining back to new spec (5.665"). I let you know that is was worn, and needed welding. Based on the info you gave for the ski, and the type of impeller you had ( a Skat Std impeller), I suggest a 9/17. Any lower it will beat your rev limiter. The fact that I didn't CHANGE the name or repitch it completely is beside the point. In your case, I felt that correcting the pitch was best. The impeller would cavitate and perform poorly because of the large gap between it and the housing, and the blade pitch was off from the damage (or previous repitch attempt).
By the way, we keep all the notes with the work order.
Per your note. "This impeller has supposedly been repitched already, but I have no idea if it is a 9/17 Skat".
There's no fast one being pulled on you here Brett. You now have a virtually brand new impeller (tight in the pump, at a good accurate pitch) and refinished and balanced for less than $100.00. You left it up me to pitch it for your application. Run it. If you don't like it CONTACT ME. That's the right pitch for your stock ski using that design impeller. That's the best way to get results, before you get on the internet and try to smear a company's good name.
David Stewart
Impros