394019 5052K Air Filter with 272490 Pre Filter Compatible with Briggs Stratton 394019S 398825 4136 5052 5052H John Deere AM38990 Lesco 050380 Craftsman 24150 Fits 400700-422700 Lawn Tractor Engine

What It Is

This two-piece air filter set (paper filter + foam pre-filter) replaces OEM part 394019S/398825 for Briggs & Stratton engines in the 400700–422700 series. Designed for lawn tractors, zero-turn mowers, and riding mowers from John Deere, Craftsman, Lesco, and others using these engines.

Fitment & Compatibility

• Engine series: Briggs & Stratton 400700, 400707, 405777, 407577, 420707, 422700 (check engine model number, not mower model).
• Direct OEM cross: Replaces Briggs 394019S, 398825, 4136, 5052, 5052H; John Deere AM38990; Lesco 050380; Craftsman 24150.
• Mower brands: Fits most Craftsman, John Deere, Lesco, Husqvarna, MTD, and Toro riders using these Briggs engines.
• Check before buying: Confirm your engine’s model number (stamped on valve cover or blower housing). Measure filter base: paper filter is ~6.75” long x 4.5” wide, pre-filter ~5” x 3.5”. If your old filter has different dimensions, this won’t fit.

Key Things to Know

• Quality: Aftermarket, but solid 4.6 rating. Pre-filter foam is denser than some OEMs—rinse with soapy water, dry, and oil lightly for best dust trapping.
• Installation: Simple swap—remove old filter, drop in new paper filter, slide pre-filter over top, secure with cover. No tools needed.
• Gotcha: Some users report pre-filter being slightly tight on certain engine covers. Trim foam edge with scissors if needed—don’t force.
• Maintenance: Replace paper filter yearly or after 100 hours; clean pre-filter every 25 hours in dusty conditions.

Should You Buy It

If you have a Briggs 400700–422700 engine in a lawn tractor or rider and want a reliable, budget-friendly alternative to OEM, this is a solid pick. It’s cheap, easy to install, and well-reviewed. Skip it if you need a perfect OEM fit or have a non-Briggs engine—check your engine number first.