For 1968 & later Johnson/Evinrude 2-cyl, 25-50 Hp | 3-cyl, 35-75 Hp | V4, 85-140 Hp | V6, 150-250 Hp | V8, 250-300 Hp outboards.
ID: 0.5″ | OD: 0.625″ | W: 0.0625″

also crosses with:
Sierra: 18-7165-9
GLM: 80140