Hey Ben:

I've got a 2000 4 stroke 9.9 Suzuki on a 15 foot Smokercraft and it will push it along at 20-21 believe it or not. I started with a 12 footer, it developed leaks, Smokercraft replaced it with a 15 for a few hundred more, but I kept the motor, although I'm looking to upgrade to a 25 Yamaha in a couple months. I too have a freind with one on a 15 foot Gregor and it performs flawlessly anywhere from flat out to dead slow. The Suzuki sure broke in hard - it was over a year before it would settle down and troll, but now that the rings have seated it is performing flawlessly. I'll be looking to sell it in June, probably a bit small for what you want it for, but make someone on a big boat a great trolling motor.