Ok, so today, I took the boat out alone. The engine ran 4750 at WOT, which translates to about 16.5mph, on the gps. I’m still going to change the prop, but may also buy the 15hp carb and exhaust port, since in 2003, the 8, 9.9 and 15 Mercs were all 323 cc engines. I’ll probably change out the...