I recently bought a used 17 foot boat called a vector with a 200 Suzuki outboard on it.When I take it out it always wants to porpoise real bad. I've tried different trim settings, and it is better when trimmed in but it still does it and the boat slows down when trimmed it. Somebody told me the motor height maybe wrong. I think the cavitation? plate is like 5 or 6 inchs above the bottom of the boat.Also I'm running a stainless prop that has 23 stamped in the side and when I get to 6000 rpm the engine starts to cut out. I guessing I have the wrong prop. Anybody know what kind of prop I should get.