Sierra 18-0515 Lower Unit Oil Seal

The Sierra 18-0515 is a precision-engineered lower unit oil seal designed for marine stern drive and outboard motor applications. This seal provides critical protection against oil leakage and water intrusion in the lower unit assembly, ensuring reliable performance and preventing costly damage to internal gearing components.

Key Features:

• Precision-molded construction for exact OEM fitment and sealing performance
• High-quality elastomer material resists marine environment exposure, saltwater, and petroleum-based oils
• Prevents oil leakage from lower unit while blocking water contamination
• Direct replacement for original equipment seal
• Manufactured to meet or exceed OEM specifications

Sierra Marine is a trusted aftermarket supplier of marine engine parts and accessories. This seal is essential for proper lower unit maintenance and should be replaced whenever the lower unit is serviced or repaired to ensure a proper seal and prevent future failures.