HONDA GX100 thick adjuster spring 16561-Z0D-000 Item description:
Manufacturer - HONDA
Catalog number: 16561-Z0D-000
Application: HONDA GX100 engines
Item no. 4 from the catalog card (second photo)
Dimensions (according to the third picture): L ~ 80mm, D ~ 6.5mm, Lk ~ 14.5mm
Original spring, brand new.