frequent_flyer
Registered User
Arizona, USA
I see what you are saying. I would need to have it in my hands to determine the correct answer. In other governors those parts are separate.
Hartzell manual 159 - https://hartzellprop.com/MANUALS/159-0000-A.pdf shows the S-1-73 governor is used only on CubCrafters aircraft. The more generic S-1-x is used on many different aircraft types so maybe someone has one on the bench and would be willing to pull the end plate.
(Search manual 159 for "Governor Assembly, S-1-" to find all the aircraft it is used on.)