I bought a 1987 18ft winner zz880 mach II boat and I'm thinking the motor is way to big. It has an evinrude 235hp and thinking it's too big. If it's not to big was wondering what size prop and pitch I need since it didn't have a prop on it. I checked on Iboats.com and it said the boat weighs 890 lbs but on nada.com it says 2200 lbs. Was wondering what the correct weight would be