For 1967-84 Johnson/Evinrude 1-cyl, 1.5-2 Hp | 2-cyl, 4 Hp outboards.
Hub uses key
ID: 11 mm | OD: 47.6 mm
W: 14.1 mm | 6 blades

also crosses with:
Sierra: 18-45221
GLM: 89960
Mallory: 9-45221