18-7186 SIERRA "SEALING O-RING"

This Sierra sealing o-ring (18-7186) is a precision elastomer component designed to create watertight seals in marine engine assemblies. The engineered material resists fuel, oil, and saltwater exposure while maintaining flexibility across temperature ranges. Essential for preventing fluid leakage in fuel systems, cooling circuits, and engine housings. A reliable replacement part that restores proper sealing integrity on compatible marine engines and outboard systems.