ok so 13 mph was all i could squeeze out of it lol at 2900 rpm if i forced throttle foward engine sounded like it was gonna lose power so sweet spot was 2800 but never got engine over 3k rpm, also found out boat weights about 4960 total with full tank of gas and totally loaded . doubt very seriously i put a 1000 lbs in new glass on boat so i think bayliner/trophy must have lied about weight. prop im using was a 15x16 prop i had available but prop calcs are all over the place ....