Air Filter Briggs & Stratton #491588 | ESF101-046

The ESF 101‑046 Air Filter is a durable, high‑performance replacement intake filter designed to protect small gasoline engines by efficiently capturing dust, dirt, and airborne contaminants before they enter the engine’s combustion system. Engineered as an OEM‑equivalent for Briggs & Stratton part #491588S, this filter is ideal for use in walk‑behind mowers, garden tractors, and other outdoor power equipment equipped with compatible horizontal‑shaft engines. With quality construction and dependable filtration performance, the ESF 101‑046 helps maintain engine efficiency, reduce wear, and extend equipment life — backed by the trusted ESF parts brand.

• OEM‑Equivalent Replacement (Briggs & Stratton #491588S) - Precisely matches original manufacturer specifications for easy fitment and reliable performance.
• High‑Efficiency Filtration Media - Effectively traps dust, dirt, and debris to help prevent abrasive wear and protect engine internals.
• Improves Engine Performance - Cleaner intake air supports more efficient combustion — leading to smoother starts, steady power delivery, and better fuel economy.
• Durable Construction - Built from rugged materials to withstand outdoor use and repeated service intervals, reducing the need for frequent replacements.
• Direct Drop‑In Replacement -Simple installation with no modifications required, saving time for technicians and equipment owners.
• Reduces Maintenance Costs -By helping keep contaminants out of the engine, this filter lowers the risk of costly repairs and extends equipment service life.
• Backed by ESF Parts Expertise - Part of Équipements ESF’s extensive outdoor power equipment parts network — supported by decades of distribution and technical experience