Greetings All, New boater here, have some questions on motor and performance, I bought a used 2015 a sweet water 2086 BF with a Yamaha f70 (4 stroke ) with about 80 hr on it, I am running a duel thrust 14X11 pontoon prop on it now and I am getting about 21 - 22 mph at 6300 - 6400 rpm with it, when I have 6 - 8 people on it…