I have a 1979 11A, and recently when I had her on the hard (actually as we lifted her) observed there is 2 bladed prop. For the size of boat and wet surface I was expecting a 3 blade. How would I determine what type of a prop to install. Seems there is a calculation that I could use that would help.
Or, just leave it alone because the drag is less.
Or, just leave it alone because the drag is less.