This product has been discontinued by the manufacturer and has been superseded by Mercury 30-20839TSierra 18-1190 Ball BearingSierra high-quality ball bearing. Reverse gear for Force/Mercury/Mariner 25-60 HP (2, 3 cyl., & 4-Stroke) including 30 Jet - 45 Jet.Interchangeable with: Chrysler/Force/US Marine; 30-20839; Mallory; 9-75100; Mercruiser Stern Drive; 30-62699; 30-20839T; 30-20839; Mercury Marine; 30-20839T; 30-20839; FI9000034;