For 1968-82 Johnson/Evinrude 2-cyl, 3-6 Hp outboards.
Hub uses key 47-02357
ID: 10.93 mm | OD: 69 mm
W: 12.72 mm | 6 blades

also crosses with:
Sierra: 18-3001
GLM: 89580
Mallory: 9-45216