This isn't comforting to know for me & others with these engines, I have the Courage 18 HP single. I'll be keeping my fingers crossed I guess. Thanks for sharing.The motor is 2 years old, single cylinder Courage, and was not over-reving.
It had plenty of oil and less than 100 hours.
One of the long bolts from the head to the crankcase broke.
The side of the combustion chamber burst open and the piston popped out.
Everything else went forward (valves, exhaust, etc)