Im trying to identify my prop. Its on a Evenrude 70 hp (1984) The size is 13 3/8 x 17<br />It also has the number 384139 and the letter "M" <br />with a circle around it. It is stainless steel.<br />Couldnt find the model number on any of the websites. Could the "M" stand for Michigan Wheel?<br />Any help appreciated.