For 1985-2002 Johnson/Evinrude 2-cyl, 40-55 Hp outboards.
Hub uses key 47-01757
ID: 19.15 mm | OD: 91.3 mm
W: 25.4 mm | 3 blades

also crosses with:
Sierra: 18-3104-1
GLM: 89460
Mallory: 9-45204, 9-45211