I have a 1992 20' w/a Bayliner Trophy. Motor is a 1992 Force 150. Currenly the prop on the boat is an aluminum 13.25x17
With just myself and 40gal of fuel, it will get up on plain and do about 30mph wot at around 5000 rpm
With 3 people and same fuel, it will only do about 15mph and will not...