793569 793685 Air Filter Replacement for Brigs - Straton Intek 33R877 31Q777 331777 31L777 31P677 Replacement for John Deere GY21055 MIU11511 LA125 LA115 D100 D110 D120 L100 E110 LG271 Parts

What It Is

This is an aftermarket air filter replacement designed for Briggs & Stratton Intek engines (models 33R877, 31Q777, 331777, 31L777, 31P677) and compatible John Deere riding mowers (LA125, LA115, D100, D110, D120, L100, E110, LG271). It replaces OEM part numbers 793569, 793685, GY21055, and MIU11511, delivering clean air to the carburetor for proper engine performance.

Fitment & Compatibility

Before buying, check your engine model number (stamped on valve cover or blower housing) and mower model. This filter fits:

• Briggs & Stratton Intek single-cylinder engines with model numbers listed above (common on 2000s–2010s riders).
• John Deere 100-series and LA-series tractors (e.g., D100, LA125) with compatible engines.
• Measurements: Filter dimensions approx. 5.5” x 4” x 1.5” – confirm against your old filter if possible.
• OEM vs aftermarket: This is not a genuine Briggs or Deere part; it’s a third-party replacement. Verify the foam pre-filter (if included) matches your housing.

Key Things to Know

• Quality variance: Aftermarket filters may have slightly thinner foam or less dense pleating than OEM. Acceptable for routine use, but inspect for gaps around the seal.
• Installation is easy: No tools required – remove old filter, clean housing, drop in new one. Ensure the foam pre-filter (if present) is aligned properly or debris will bypass.
• Common gotcha: Some users report the filter doesn’t sit perfectly flush in certain Intek housings. Test fit before tightening the cover – if it’s too loose, return it.
• Change interval: Replace every 25 hours or annually, more often in dusty conditions. A dirty filter causes hard starting and reduced power.

Should You Buy It

Yes, if you need a budget-friendly air filter for a Briggs Intek or compatible John Deere rider and you’re comfortable with aftermarket quality. It’s a solid value for routine maintenance, but if you prefer exact OEM fit or have a high-hour engine, spend extra for genuine Briggs or Deere parts.