Description
SIERRA Chrysler/Force Lower Gearcase Seal Kit – 18-2640
Lower gearcase seal kit for selected Chrysler/Force/US Marine lower units using FK1203 / FK1203-1, including many late-1980s/early-1990s 85-150 HP/L-drive applications. It is intended as an application-specific replacement for the original marine component and is cross-referenced by the OEM/aftermarket numbers listed below.
- Application: selected Chrysler/Force/US Marine lower units using FK1203 / FK1203-1, including many late-1980s/early-1990s 85-150 HP/L-drive applications
- Function: Provides the gearcase oil seals, O-rings and gaskets used during lower-unit reseal service.
- Component: Lower gearcase seal kit
- OEM kit: FK1203 / FK1203-1
- Interchange: Chrysler/Force/US Marine: FK1203, FK1203-1; GLM: 87807; Mallory: 9-74207
Confirm the engine or sterndrive model, serial range and original part number before installation. During service, inspect adjacent seals, fasteners, hoses and mating surfaces so a related fault is not carried into the repaired assembly.
Specifications
- Component: Lower gearcase seal kit
- OEM kit: FK1203 / FK1203-1
Interchange / Replaces
- Chrysler/Force/US Marine: FK1203, FK1203-1
- GLM: 87807
- Mallory: 9-74207


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