Briggs & Stratton 842921 Pack of 2 Oil Filters

What It Is

The Briggs & Stratton 842921 is a pack of two spin-on oil filters designed for air-cooled small engines, typically found on lawn mowers, riding tractors, and generators. It filters engine oil to remove contaminants, extending engine life.

Fitment & Compatibility

Before buying, confirm your engine model. This filter fits many Briggs & Stratton single-cylinder and V-twin engines (e.g., Intek, Endurance, and Professional Series) with a standard 3/4-inch-16 thread and a gasket diameter of about 2.5 inches. It replaces OEM numbers 842921, 492932, 698369, and 5041H. It is not compatible with Kohler, Kawasaki, or Honda engines unless cross-referenced. Check your engine’s model number (stamped on the valve cover or blower housing) and consult the Briggs & Stratton online lookup tool. Also verify the filter’s height (approx. 3.5 inches) clears your mower deck or frame.

Key Things to Know

• Quality: OEM-grade filtration with anti-drainback valve to prevent dry starts. Rated for 100 hours or annual replacement, whichever comes first.
• Installation: Easy hand-tighten only (about 3/4 turn after gasket contacts). Overtightening can strip the filter or damage the gasket.
• Common Gotcha: This is a spin-on filter, not a cartridge/insert style. If your engine uses a paper cartridge (e.g., some Intek V-twins), this won’t fit.
• Storage: Keep the second filter sealed in its plastic bag to prevent debris contamination.

Should You Buy It

Buy this if you own a compatible Briggs & Stratton-powered mower or generator and want a reliable, OEM-quality filter at a lower per-unit cost than buying singles. It’s ideal for routine maintenance on one or two machines, but skip it if your engine uses a different thread or cartridge style.