prop info
I have a boat just like yours, and it to has a 15X12 prop, and i have no problems with it. it turns at 2250 for 5 knots, and 3500 showing 6.8 knots gps corrected with slack current. these specs change a few tenths, depending on the wind, and how much stuff you have on the bottom. I presume a 15X15 would load the engine alittle more, but give better bite into the wind. Ive read that a prop pitch should always be smaller than the diameter for top efficienty. could be hunter was pushing the limits!