Just bought the boat and plan to do some tubing and lake cruising. I think it has a 14/19 on it now and I am at about 5000 rmp at WOT. I am thinking I need some more pitch but am new to this would appreciate a recommendation. I see both 3 and 4 blade props in this range. Boat does seem to struggle to get on plane with 2 people in the tube. Engine runs very good otherwise (60 hrs on boat).