When I pulled the boat a couple weeks ago I noticed that the prop was hard against the strut. After a bit of cleaning I noticed the strut was actually worn away about 1/16". Gave the prop a hard pull and it popped back to it's normal position with about 1/2" clearance to the strut. When I got the safety wire loose the set screws were only finger tight! Bad on me, I figured with them safety wired they would be tight so I haven't ever checked them.
Ken - It's interesting that the shaft pushed forward in the coupler, but didn't spin within the coupler.
Craig
There is a key in the shaft to prevent spinning.