A strong, reliable engine starts with clean oil, and the Mercury MerCruiser Oil Filter (35-866340K01) 2-Pack ensures your sterndrive or inboard engine gets the protection it needs. Designed for GM-based MerCruiser and OMC engines, this oil filter effectively captures harmful debris, keeping oil flowing freely and reducing wear on critical components. With a two-pack, you're set for your next service interval or ready with a backup for when it's needed most.. Built for Durability and Performance. High-Efficiency Filtration - Traps microscopic particles that could cause premature engine wear, keeping oil cleaner for longer.. Anti-Drain Back Valve - Retains oil when the engine is off, preventing dry starts and ensuring immediate lubrication upon ignition.. Corrosion-Resistant Shell - The electroplated housing is built to withstand harsh marine environments, including saltwater exposure.. Practical Benefits. Routine oil changes are one of the easiest ways to extend engine life and maintain