What a headache, I went to all the sites did my research and there just no straight answer. Diameter, pitch, hubs, splines..... I pulled the dam thing, counted the splines, hammered the hub out and walked into west marine and went through there stuff. I just felt like its a $150 crap shoot and maybe I get the right prop when buying online. Good thing because on more than one occasion it matched my motor with a 13 spline hub when in fact it is a 15. So I ened up buying 13.25 x 17 pitch prop. Wish me luck this weekend!
