Well that's great news, a big step forward and explains a lot!
That's the 'Woodruff Key' that has sheared.
The reason it's sheared is probably because the flywheel was not pushed securely onto the taper of the crankshaft, maybe the flywheel nut wasn't tightened properly? Maybe dirt/debris on the taper not allowing it to seat properly? Maybe damage to the taper on the crankshaft or taper on the flywheel?
Before you fit a new Woodruff Key, carefully inspect both tapers, run your fingers around both tapers feeling for any damage or 'high spots'.
All the best, Dave.
|