792105 276890 Air Filter Tune Up Kit Compatible with B&S 593435 593240 407777 40G777 40H777 445667 445877 44H777 Engine, Compatible with John Deere D170 Z425 GY21057 MIU11515 MIU11517 792105 593435

What It Is

This air filter tune-up kit includes a pre-filter and main air filter designed for Briggs & Stratton single-cylinder engines, commonly used in John Deere lawn tractors like the D170 and Z425. It’s a direct replacement for OEM part numbers 792105, 276890, and 593435.

Fitment & Compatibility

• Check your engine model number (stamped on valve cover or blower housing) against B&S numbers: 593435, 593240, 407777, 40G777, 40H777, 445667, 445877, or 44H777.
• Also fits John Deere part numbers GY21057, MIU11515, and MIU11517.
• Measure your existing air filter housing: this kit fits standard 3.5” x 2.5” rectangular filters with a foam pre-filter wrap.
• Aftermarket replacement – not OEM, but uses same dimensions and foam density. Verify the pre-filter sleeve fits snugly over the main filter without gaps.

Key Things to Know

• Quality difference: Aftermarket foam may be slightly less dense than OEM – rinse and oil it before use for best dust capture.
• Installation: No tools needed – just swap the old filter and pre-filter. Takes under 5 minutes.
• Common gotcha: The pre-filter sleeve can slide off if the housing isn’t fully closed. Check that it’s seated flush before tightening the cover.
• Worth noting: This kit does not include a spark plug – you’ll need a separate plug if your tune-up plan includes one.

Should You Buy It

If you own a John Deere D170, Z425, or similar B&S-powered mower and need a budget-friendly filter swap for seasonal maintenance, this kit works well. It’s a solid value at $16 for two filters, but expect slightly less durability than OEM – fine for home use, not ideal for commercial cutting.