G'day Widget
That is a fantastic illustration of the belleville washer!
Yes, that's how it must be fitted.
This is a learning experience for most folks, and great information
for members who will encounter this.
If you cut residential lawn, this washer replacement will be a sound
repair. Now that three lugs have been lost - be prepared for plan B
in the scenario, given no shock protection from the blade holder boss.
Great story.
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Jack