For Yanmar Spline Hub
ID: 14.29 mm | OD: 65 mm
W: 50.2 mm | 8 blades

also crosses with:
Sierra: 18-3077
Jabsco/Johnson Pump: 17937-0001 | 09-1028B
Mallory: 9-45710
Oberdorfer: C7441
Yanmar: 127610-42200-01