2 Pack 491588S Air Filter for BS 491588 Craftsman 33644 Toro Troy-Bilt Push Lawn Mower & 5062K Spark Plug

What It Is

This 2-pack includes an air filter (part 491588S) and a spark plug (5062K) for 4-stroke push mowers with Briggs & Stratton engines. Designed for routine maintenance to improve engine airflow and ignition performance.

Fitment & Compatibility

• Air filter: fits Briggs & Stratton engines using filter #491588S (common on 450E, 500E, 550E series). Compatible with Craftsman 33644, Toro, and Troy-Bilt push mowers.
• Spark plug: 5062K (equivalent to Champion RJ19LM, J19LM). Replaces many Briggs & Stratton, Tecumseh, and Kohler engines.
• Check before buying: verify your engine model number (stamped on engine shroud), not just mower brand. Measure air filter cross-reference if unsure. Spark plug gap may need adjustment (0.030” typical) – not pre-gapped for all engines.

Key Things to Know

• Quality: aftermarket parts, not OEM Briggs & Stratton. Most users report acceptable fit and performance for the price.
• Installation: air filter slides into housing; replace screw-on cap. Spark plug requires a 13/16” or 5/8” socket – tighten to 20 ft-lbs (hand tight + 1/2 turn).
• Common gotcha: spark plug may be too long for some compact engine designs – check clearance against old plug before installing. Air filter may be slightly thicker than OEM – ensure housing closes fully without forcing.
• Maintenance schedule: replace air filter annually or after 25 hours; spark plug every 100 hours or if starting issues arise.

Should You Buy It

This is a solid budget-friendly option for DIY maintenance on common Briggs & Stratton push mowers. Best for users who want a quick, cheap tune-up pack and are comfortable verifying fitment and gapping the plug themselves. Skip it if you prefer OEM parts for critical engines or need a plug pre-gapped to exact specs.