Contaminated fuel is one of the quickest ways to compromise outboard performance, but the Mercury Quicksilver 4-Stroke Outboard In-Line Fuel Filter (35-879885K) helps keep your engine running clean and smooth. Designed to trap debris and impurities before they reach the fuel system, this OEM-quality filter protects essential components, ensuring reliable operation and long-term durability. Whether you’re running a 25 HP EFI or a 300 HP Verado, this in-line fuel filter plays a critical role in engine health.

Built for Clean, Consistent Fuel Flow

• High-Efficiency Filtration – Captures fine particles and debris, preventing fuel system damage and maintaining optimal performance.
• Versatile Compatibility – Engineered for 25-40 HP EFI, 40-60 HP 4-cylinder EFI, 75-115 HP (1B366823 & up), and 135-300 HP Verado outboards.
• OEM Precision – Manufactured to Mercury Marine standards, ensuring a perfect fit and seamless integration into your fuel system.

Essential Maintenance for Peak Performance

Fuel contamination isn’t always visible, but even minor impurities can cause rough idling, power loss, and long-term wear. Replacing the filter regularly ensures clean, uninterrupted fuel flow, keeping your outboard performing at its best. A simple but essential upgrade for serious boaters who demand reliability on the water.