A well-secured engine runs smoother, lasts longer, and handles the unpredictable marine environment with ease. The Mercury Washer (12-856982) is designed to keep critical fasteners locked in place, preventing loosening from engine vibration and constant exposure to water. Whether you're working on your Mercury or MerCruiser setup, this washer ensures bolts and fittings stay secure where they matter most.

Precision-cut for OEM specifications, this washer delivers a perfect fit and even load distribution, reducing stress on fasteners and surrounding components. Made from marine-grade stainless steel, it resists corrosion, rust, and wear—essential for parts exposed to fuel, water, and extreme conditions. Whether it's securing steering components, mounting brackets, or key fasteners in high-stress areas, this washer is a small but essential part of keeping your rig running strong.

Why It’s Essential:

• Locks Fasteners in Place – Prevents bolts from loosening under constant vibration.
• OEM-Precision Fit – Built to exact Mercury specifications for seamless installation.
• Corrosion-Resistant Build – Marine-grade stainless steel ensures long-term durability.

Neglecting small hardware can lead to bigger issues down the line. Keeping fresh washers in place ensures your engine stays tight, reliable, and ready for every run.