A secure, leak-free seal is a small but vital part of keeping a marine engine performing at its best. The Mercury O-Ring (2.175 x .103) - 25-8M0142854 is engineered for precise fitment in select Mercury and MerCruiser engines, ensuring optimal sealing in gear housings and other critical areas.

Crafted from high-quality, fuel- and oil-resistant materials, this O-ring is built to withstand the demanding conditions of marine environments. Whether replacing a worn seal or conducting routine maintenance, installing a fresh O-ring helps prevent leaks, maintain system integrity, and extend the life of your engine’s components.

Why It’s an Essential Component:

• Prevents Leaks & Contamination – Keeps vital engine areas sealed, reducing wear and preventing fluid loss.
• OEM Precision Fit – Manufactured to Mercury Marine’s exact specifications for guaranteed compatibility.
• Durable Construction – Resists breakdown from fuel, oil, and harsh marine conditions.

Even the smallest seal plays a big role in keeping an engine running smoothly. Swapping out an old or damaged O-ring is a quick, cost-effective way to prevent more serious issues and keep your outboard or sterndrive performing at its peak.