Briggs & Stratton

What It Is

This is a genuine Briggs & Stratton replacement air filter (part number 594256) designed for use in many Briggs & Stratton single-cylinder lawn mower engines, including those found on push mowers, walk-behinds, and some riding mowers. It filters dust and debris from intake air to prevent engine wear.

Fitment & Compatibility

Before buying, check your mower’s engine model number (stamped on the valve cover or blower housing). This filter fits Briggs engines with a 2.5–6.5 HP range, including the 500e, 550e, 575e, 600e, 625e, 675e, 700e, 725e, 750e, 775e, and 800e series. It replaces OEM part numbers 594256, 594257, 691031, and 691032. It does not fit engines using a foam-only or pre-cleaner-style filter. Measure your current filter’s length and width—this one is roughly 3.5 x 2.5 inches. If your filter housing uses a stud or tab mount, verify the hole pattern matches.

Key Things to Know

• Quality: Genuine Briggs filter media is pleated paper; aftermarket versions may be thinner and clog faster. This one is OEM, so fit and filtration are reliable.
• Installation: Takes about 2 minutes—no tools needed. Remove the cover, swap the old filter, and reinstall the cover. Ensure the cover snaps fully to avoid unfiltered air bypassing the filter.
• Common gotcha: Some newer Briggs engines (e.g., 850ex series) use a different filter shape—double-check your engine series number before ordering. Also, this filter is not washable; replace it every season or after 25 hours of use.
• Price vs. value: At $19.97, it’s slightly higher than generic brands, but the fit is perfect and it won’t void your engine warranty.

Should You Buy It

If you own a compatible Briggs & Stratton single-cylinder engine and want a hassle-free, guaranteed fit that maintains engine performance, this is the right choice. It’s ideal for DIY maintainers who prefer OEM reliability over saving a few dollars on a generic filter. Skip it if your engine uses a foam or dual-stage filter.