5 Pack 797301 Foam Air Filter Cleaner Replace for B&S 4249 5433 5433K 797301 100-955 Fits BS 675-875 Series 111000 112000 114000 121000 122000 124000 Engine

What It Is

This is a 5-pack of foam air filter replacements designed for Briggs & Stratton engines in the 675-875 Series, covering 111000, 112000, 114000, 121000, 122000, and 124000 model numbers. It fits lawn mowers, tractors, and other small engines using the 797301, 4249, 5433, or 100-955 OEM filter numbers.

Fitment & Compatibility

Before buying, confirm your engine model number (e.g., “12H802” or “114000”) is in the listed series. This filter measures approximately 2.5 inches wide, 1.5 inches tall, and 0.5 inches thick. It replaces OEM part numbers 797301, 4249, 5433, 5433K, and 100-955. It fits most B&S engines from the 675 through 875 series, including older single-cylinder OHV and L-head models. Check your owner’s manual or remove the old filter and compare dimensions—especially thickness, as a slightly taller filter may not seat properly in the air cleaner housing.

Key Things to Know

• Quality: These are aftermarket foam filters, not OEM. They’re pre-oiled and ready to use, but some users report slightly thinner foam than original B&S parts. Still, they filter adequately for residential use.
• Installation: Very easy—no tools required. Just remove the old filter, wipe out the housing, and press the new one in. Ensure it sits flat and seals around the edges to prevent unfiltered air intake.
• Common gotchas: Over-oiling can cause engine smoking or oil drips, but these come pre-oiled correctly. If your engine has a separate pre-filter, this pack replaces only the main foam element. Do not wash or reuse these—they’re disposable.
• Pack value: Five filters for $8.39 means you can change them every 25-50 hours of use for a full season or two, depending on mowing conditions.

Should You Buy It

If you need a cost-effective, multi-pack replacement for a B&S 675-875 series engine and don’t require OEM branding, this is a solid buy. It’s ideal for homeowners with one or two mowers who want to keep spares on hand. Avoid if you need a perfect factory fit for commercial use or a pre-filter combo.