I have a 87 35 hp force motor and a 14ft starcraft v thats rated for a max of 45 hp. I would like enough speed to tow 2 kids on a tube and 2 adults on board. Kids about 200lbs and adults about 225lbs. Should this be enough motor. Also is there more than 5 hp differnce at the prop with a 59 model Johnson 40hp and a 87 force 35hp. Thanks for any help.