i just traded my 17' tracker with 40 hp for a 1987 charger 185v 150 hp evinrude. it has a stainless steel 4 blade prop on it that i believe the guy told me was called a shooter. i could be wrong on that. any way if any one can help me i would like a little schooling on props. like how to tell the pitch. why different pitches make a difference. advantages over stainless. anything really. i never new anything about props just that they can be expensive. thanks and i look forward to reading any comments.