799584 Carburetor with Spark Plug and Air Filter Replacement for 592361, 594529, 594508, 594507 Compatible with 550EX 625EX 675EX 725EXI 140cc Engines, Husqvarna LC 121P, Troy-Bilt TB110 TB200

What It Is

This is a complete carburetor replacement kit that also includes a spark plug and air filter, designed for small engines in the 140cc to 190cc range. It’s intended for walk-behind push mowers, specifically models like the Troy-Bilt TB110/TB200 and Husqvarna LC 121P, as well as engines from the 550EX to 725EXI series.

Fitment & Compatibility

Before buying, verify your engine’s exact model number (e.g., 550EX, 625EX, 675EX, 725EXI) – these are common on Troy-Bilt, Husqvarna, and some Craftsman mowers. The kit replaces OEM part numbers 592361, 594529, 594508, and 594507. Measure your carburetor mounting bolt spacing (typically 2.5 inches center-to-center) and check that the fuel line diameter matches (usually 1/4-inch). Also confirm your mower’s deck size – this fits most 21-inch to 22-inch decks, but not zero-turn or riding mowers. If your engine has a different carburetor gasket pattern or a primer bulb, this kit may not fit.

Key Things to Know

• Quality: Aftermarket part – generally reliable for the price, but some users report minor gasket or seal issues. Inspect all rubber gaskets before installation.
• Installation difficulty: Moderate. You’ll need to disconnect the fuel line, remove two bolts, swap the carburetor, and adjust the idle screw (often pre-set). Expect 20–40 minutes.
• Common gotchas: The supplied spark plug may not match your engine’s gap spec – check and adjust to 0.030 inches. Also, the air filter is foam; it works but is less durable than a paper element. If your mower has a primer bulb, this carburetor may not include one – you might need to reuse your old bulb.
• Warranty: No brand warranty, but Amazon’s return policy applies. Test fit before final installation.

Should You Buy It

Buy this if you need a budget-friendly, all-in-one replacement for a common Troy-Bilt or Husqvarna push mower engine and you’re comfortable with basic small-engine repair. It’s a good value for the price, but if you demand OEM fit and finish or have a less common engine model, spend a bit more on a genuine replacement.