Hi, I need some help selecting a prop. I live at over 5000 feet so the motor is well below power compared sea level. Its on a 16ft tri hull with a lot of gear in it. (Fishing platforms replace the original interior and open bow) I have NO CLUE on what prop size or type to use. 4 or 3 blade? stainless, plastic, aluminum? Size and pitch are a real mystery to me!! Does anyone know what it came it originally? Any suggestion you have would be of great help.<br /><br />Thanks in advance<br /><br />Dave