Engine Type: Lower Unit Gearcase Seal Kit Engine Position: Outboard Compatibility: Compatible With Force 25 , 40 , and 50 outboard engines (1989–1994); Compatible With Force 35 –50 outboard engines (1979–1982); Fits Sierra 18-2636; Compatible With part numbers 26-820645A1, FK1074, 87810 Material: Rubber and metal components Kit Contents: Complete outboard lower unit seal kit The 26-820645A1 FK1074 outboard lower unit seal kit is designed to replace worn or damaged seals in the lower unit gearcase of compatible Force outboard engines.It includes all necessary seals and components for a full lower unit reseal.The rubber and metal construction is intended for use in marine environments.This kit is engineered to restore sealing function for the specified models and years. Compatibility Clarification: This part is not made by the brand.Mentioned models are for reference only.