593260 Air Filter with Spark Plug for Lawn Mower, Air Filter Set for 500EX 550E 625EX 725EXi, Replacement Parts for TB110 TB115 TB200 TB230 TB330 TB370 Lawn Mower Engines (2 Air Filter, 2 Spark Plug)

What It Is

This is a combo replacement set including two air filters and two spark plugs for Troy-Bilt and Craftsman lawn mowers with 500EX, 550E, 625EX, or 725EXi engines. It’s designed for routine maintenance to keep small engines running smoothly.

Fitment & Compatibility

Before buying, confirm your mower’s engine model (stamped on the engine shroud or valve cover). This set fits 500EX, 550E, 625EX, and 725EXi engines, plus TB110, TB115, TB200, TB230, TB330, and TB370 models. It is NOT universal—check that your spark plug gap matches the OEM spec (usually 0.030” for these engines). Measure the air filter dimensions: the pre-filter foam should be about 3.5” x 2.5” x 1.5”. Do not rely on deck size—engine model is the key compatibility factor.

Key Things to Know

• Quality: Aftermarket parts; rated 4.6/5 from 32 reviews. Expect comparable performance to OEM, but longevity may vary.
• Installation: Easy—remove old air filter cover, swap the filter (foam side out), and replace spark plug with a socket wrench. Gap the new plug to 0.030” before installing.
• Common Gotcha: The spark plug may be pre-gapped incorrectly. Always verify with a gap tool. Also, the air filter foam may be slightly thicker than OEM—trim if it doesn’t seat fully.
• Quantity: Two of each means one spare set for next season—good value.

Should You Buy It

Buy this if you have a compatible Troy-Bilt or Craftsman mower with one of the listed engines and want a budget-friendly, no-fuss maintenance kit. It’s ideal for DIYers who can gap a plug and don’t need OEM labels. Skip it if you prefer exact OEM fit or need a single filter/plug.