So, yes, I get it... the proper propeller question is probably the most asked question on any boat forum. But... I'm still going to ask it. What good is a boat forum without a virtual cornucopia of screw threads? Everyone loves to ad their 2ยข (I've got a mac, so making the "cents" sign is as easy as pressing option + 2) to the prop threads. First, my current boat specs: Year: 1998 (I was 15 years old when this boat was sold) Make: Chaparral (what else would it be on this forum?) Model: 2130 SS (Limited Edition - I think that got you some faux wood trim, a compass, and a depth sounder... how