these are my readings I took this summer on a lake in Pa.
The pontoon is an '07, twin 25" tubes, 24'. Two adults on board, full 24 gallon tank, no wind.
Tach is a mercury smartcraft, speed is GPS, motor is a 2021 Merc. 115 hp Command thrust, prop is a black max ,3 blade, 16x12.....
I was trying...