Skip to content Skip to navigation menu
Live Chat

SIERRA
Upper Unit Gear Set for Mercruiser Stern Drives

$369.99

Model # 10513851 | Mfg # 18-2201
Ships directly from the vendor
  • replaces: Mercury Marine 43-18411A2
  • replaces: Mercury Marine 43-18410A2
  • Includes: (1)18-1142 (1.5:1 Ratio) Drive Gear=22 Teeth Driven Gear=20 Teeth

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.