I just bought a Zodiac Futura MKII C from 1995 and with a Yamaha 20hp 2-stroke from 1995. The propeller is 9 7/8" x 12". The propeller is not in perfect shape, but seems quite ok.
The boat only makes 20-21 knots (GPS) with one person. I expected more from this boat. The engine seems to rev a...