4 Pack 593260 Air Filter, Pre Filter, Spark Plug, Lawn Mower Fuel Filter 1/4", Compatible with 500EX 550EX 575EX 625EX 675EXI 725EXI Engines, TB110 TB200 TB230 Models, 798452 Lawn Mower Air Filter

What It Is

This 4-pack service kit includes an air filter, pre-filter, spark plug, and fuel filter (1/4" barb) for routine maintenance on small engines—specifically Briggs & Stratton 500EX through 725EXI series and select Troy-Bilt TB models. Designed for 30–60 minute tune-ups on push mowers, trimmers, or small tractors.

Fitment & Compatibility

• Engines: Briggs & Stratton 500EX, 550EX, 575EX, 625EX, 675EXI, 725EXI (check your engine model number on the valve cover or blower housing).
• Troy-Bilt models: TB110, TB200, TB230 (verify deck size—fits most 20–22" push mowers).
• OEM cross-references: Air filter 593260, 798452; pre-filter 593261; spark plug RJ19LM or equivalent; fuel filter 1/4" barb (inner diameter 1/4"). Measure your existing fuel line—if it’s 5/16" or 3/8", this filter won’t fit.
• Before buying: Confirm your engine’s model number (e.g., 12A-xxx) and spark plug gap spec (typically 0.030" for RJ19LM). Not compatible with Intek or larger V-twin engines.

Key Things to Know

• Quality: Aftermarket parts, not OEM Briggs & Stratton. Pre-filter foam is basic—works fine but may degrade faster than OEM. Spark plug is standard copper; replace every 100 hours.
• Installation: Simple—remove old air filter and pre-filter, swap spark plug (gap it first), and cut fuel line to insert fuel filter (arrow on filter points toward carburetor). No special tools beyond a spark plug socket and pliers.
• Gotcha: Fuel filter is only 1/4" barb. If your mower uses 5/16" or 3/8" fuel line, you’ll need an adapter or separate filter. Some users report the pre-filter is slightly smaller than OEM—trim foam if needed.
• Value: At $13.99, it’s cheaper than buying each part separately (air filter alone is ~$8). Good for a single season on a residential mower.

Should You Buy It

Buy this kit if you have a compatible Briggs EX or Troy-Bilt TB mower and want a low-cost, all-in-one tune-up set for basic maintenance. Skip it if you need OEM-grade longevity, have larger fuel lines, or run a commercial/zero-turn engine—go with separate OEM parts instead.