I also have the rubber ring from SS.
However, I have questions about plugging the hole.
1. Can this be done with the engine still in place? There is room if someone has a good idea for plugging the hole.
2. Is their enough oil for the chain once the hole is plugged? I assume the oil return holes at the bottom remain open and there must be enough oil vapour to help.
Thoughts on the process are appreciated.
doug