For 1989-95/2004-10 2-Stroke & 4-Stroke 2-cyl, 8-15 Hp outboards.
Hub uses key
ID: 12.2 mm | OD: 42 mm
W: 20 mm | 6 blades

also crosses with:
Sierra: 18-3099
GLM: 89970
Mallory: 9-45500