I have a 19.5 foot Sunbird Corsair Cuddy with an OMC 4.3L Cobra I/O engine.
With two passengers, and mimimal load, I get the following stats from the 17" pitch, aluminum Solas, 3 blade propeller:
wide open throttle (trimmed up): 4500 RPMs at 41 mph
3000 RPMs (trimmed down): 26 mph
coming off...