Thomas, I've got around 8 boats and about 60 props but what I do not have is a 60 size hydro with a 90 size motor. I do know that the round nose boats like a lifting prop like the 1400 series Octura. Mr. Schindler is probably right on the money(1462). Put the 260 Prather on it and give it a go. You will know if it's too much prop if it does not want to launch.