Gregg, I'm pretty sure it's not the prop/hub although the symptoms are the same.
Good suggestion Bob -- why didn't I think of that???? :hehe:
Actually, I did consider calling Evinrude/OMC/Bombardier but the User Manual said to contact the dealer first.
The good news: the Evinrude Tech seems to have diagnosed the problem. He said there is a spring that fits over a gear and acts like a clutch. The spring is probably worn out and the gear may need replacing as well. He gave me the part numbers and said that I can probably do the job myself, but would have to get the parts from an authorized dealer as he is unable to sell the parts to me directly.
The bad news: the dealer that I called said that the gear is $155 and the spring is $35. Add in the cost of the O-ring and it brings the total cost to about $200. That's almost half of what I paid for the entire motor! What a scam!!!