I went to the lake this afternoon and as I was unstrapping the motor I noticed that the prop didn't spin freely. A quick inspection revealed that the prop was rubbing against the housing and I could see cracks in the webbing behind the prop.
After I got home and took the prop off the adjusting nut just slid right out. The threads inside the housing are completely gone...
I assume that I will need a complete unit?
I'm guessing that I'm a victim of water freezing inside the lower unit. I never thought to take the transom saver off and lower the motor like I usually do in the winter...