2 Pack Air Filter with Spark Plug Kit, Replaces Briggs & Stratton 595853 597265, Fits 115P02 115P05 123P02 123P07 123P0B 123P32 125P02 125902, for 190cc 850 Series Lawn Mower Engines

What It Is

This is a 2-pack air filter and single spark plug kit designed for routine maintenance on Briggs & Stratton 190cc 850 Series lawn mower engines. It replaces OEM parts 595853 (air filter) and 597265 (spark plug), keeping small engines running clean and firing reliably.

Fitment & Compatibility

Check your engine model number (e.g., 115P02, 123P32, 125902) against the list in the title—these fit most 190cc 850 Series engines, but not all Briggs models. Verify your mower’s engine brand and series (Briggs & Stratton only, not Honda or Kohler). Measure the air filter: OEM 595853 is roughly 5.5 x 3.5 x 1.5 inches. The spark plug is a standard 14mm thread, 3/4” reach—confirm your plug gap (usually 0.030”) and that your mower uses a short-reach plug. This is an aftermarket kit, not OEM, so expect minor fit variations on older decks.

Key Things to Know

• Quality: Aftermarket foam and paper filters may be less dense than OEM—check for gaps when seating. The spark plug is a basic copper-core; fine for most mowers but not for high-hour or commercial use.
• Installation: Easy—10 minutes with a socket wrench and screwdriver. Disconnect the spark plug wire first, replace the filter (no tools), and gap the new plug to spec (0.030”) before installing.
• Gotchas: The air filter cover on some 850 Series engines can be tight; ensure the foam pre-filter (if present) is clean and not compressed. The spark plug may arrive pre-gapped—always verify with a feeler gauge.
• Value: Two filters for the price of one OEM filter, plus a plug—great for spare parts or seasonal swaps.

Should You Buy It

Buy if you own a Briggs & Stratton 190cc 850 Series mower and want an affordable, convenient maintenance kit for DIY tune-ups. Skip if you need OEM-grade filter density or a long-life iridium plug—stick with genuine Briggs parts for heavy-use or commercial mowers.