Key Features

• Genuine Briggs & Stratton OEM Filter – Part 399806S, engineered to original equipment specifications for proper fit and dependable performance.
• Foam filtration element that captures dust and debris while maintaining stable airflow to the engine, supporting clean combustion and reliable operation.
• Direct-fit replacement for the engine’s foam air cleaner housing, enabling quick servicing and minimal downtime.
• Engine durability support — helps reduce carburetor wear and internal component damage, contributing to smoother starts and consistent running.
• Designed for Briggs & Stratton small petrol engines with compatible foam air cleaner housings, suitable across multiple small-engine applications.

Product Details

• Product Type: Foam Air Filter / Air Cleaner Element
• Part Reference: 399806S
• Filtration Type: Foam
• Compatibility: Briggs & Stratton small petrol engines with matching foam air cleaner housings
• Application: Engine air filtration for carburetor protection and clean combustion
• Engine Range Note: 10 hp–12 hp vertical crankshaft engines

Compatibility

• Fits a variety of Briggs & Stratton small engines equipped with compatible foam air cleaner housings.
• Commonly used with horizontal single-cylinder families such as 550E, 600 series, and similar variants.
• Suitable for engines in the 6–10 hp range where a foam air filter housing is specified, including petrol walk-behind mowers, small garden tractors, and rotavators.
• Fitment tip: verify your engine model number and air cleaner housing design, and compare with your existing filter to confirm proper fit before ordering.