Prop fell off ?
I can't believe someone got it so soon - YES. (Well done Mike)
Boat serviced last week...doing a high speed run down the ski area to make sure everything was OK...stopped to idle close to the ramp to organised the painter on the windage side of the boat and put the motor back into gear. A bit of noise but no movement. Tried reverse - same result. Turned it off and said to Brett as I raised the motor - "Do we have something around the prop" he replied - "What prop?" (no kidding - that is what he said...)
No boats around to give us a lift in to the ramp so fortunately had enough rope for Brett to swim to shore and pull it into the ramp. (Thanks Brett).
A good example of why you test a motor after a service to make sure everything is OK.
A bad example of servicing!! (probably forgot to put a split pin in after remove/install the propeller.) I wonder what else they forgot.