Speed is greatly effected by environmental and load factors....and these change every outing. So putting that aside...I'd expect you'd see top end speed at best in low-mid 30's w/clean conditions and light load. 115hp motor on a 20ft rig that weighs in excess of 1.5 ton fully loaded is way underpowered. I believe the rated max hp is 200hp for this hull....why invest $$$ in an underpowered hull is what I'd be asking yourself, imo.
For your comparison mindset, I have a 115hp hung on '76 170 and at best I'd see white knuckle 45mph....but the 170 hull is 1100lb. The osprey 20' is 1900lbs, depending on the model/year.
