Briggs and Stratton 595297 Filter-AIR Cleaner Foam

What It Is

This is the OEM foam pre-filter element for Briggs & Stratton engines, designed to trap large debris before it reaches the paper filter. It’s used on many walk-behind mowers, tractors, and generators with Briggs engines that require a two-stage air cleaning system.

Fitment & Compatibility

• Check your engine model number – fits most Briggs engines with a foam pre-filter cavity, but not universal. Look for the engine model number stamped on the valve cover or blower housing (e.g., 12A-xxx, 12H-xxx, 17.5-xxx).
• Dimensions – approximately 4.5” x 4.5” x 0.75”. Measure your existing foam filter to confirm.
• OEM vs aftermarket – this is genuine Briggs, so it matches factory specs. Aftermarket equivalents exist but may differ in density or fit.
• Common compatible engines – 10-20 HP single-cylinder models like the 12A900, 12H800, 17.5H, 19H, and 20H series. Not for Intek V-twins with a different pre-filter shape.
• Verify your mower brand – used on many Craftsman, Husqvarna, Toro, and John Deere models with Briggs engines. Cross-check your mower’s part number or engine model.

Key Things to Know

• Installation is tool-free – just slide it over the paper filter and reinstall the cover. No screws or clamps.
• Wash, don’t replace – foam filters are reusable. Clean with soapy water or non-flammable solvent every 25 hours (or when visibly dirty). Dry fully before reinstalling.
• Don’t over-oil – if you oil it (recommended for dusty conditions), use a light coat of foam filter oil. Too much oil can drip into the carburetor and cause running issues.
• Common gotcha – some Briggs engines use a different foam filter (e.g., 593232 for larger engines). Always verify by shape and dimensions, not just engine series.

Should You Buy It

If you have a Briggs single-cylinder engine with a foam pre-filter slot and want a perfect OEM fit, this is the right choice. It’s cheap, easy to install, and extends paper filter life in dusty or leaf-heavy mowing. Skip it if your engine uses a one-piece foam-only filter or a different pre-filter shape—measure first.