Welcome. I agree with what Leon said.
I found a few links that tell a bit about the clutch washer that might be helpful.
https://oldsingersewingmachineblog.c...utch-part-one/
https://oldsingersewingmachineblog.c...nger-part-two/
http://lizzielenard-vintagesewing.bl...ion-screw.html
Janey - Neat people never make the exciting discoveries I do.
Not affiliated with off-site link(s)