799583 Carburetor Compatible with Briggs and Stratton Carb 590556 591109 591160 591979 593261 595656 798674 300E 450E 500E 550E 550EX 08P500 08P502 09P602 09P702 Series Lawnmower Engines (13pcs)

What It Is

This is a complete 13-piece carburetor kit for Briggs & Stratton single-cylinder engines, primarily used in walk-behind lawn mowers. It replaces OEM carburetors 590556, 591109, 591160, 591979, 593261, 595656, and 798674, fitting the 300E, 450E, 500E, 550E, 550EX, 08P500, 08P502, 09P602, and 09P702 engine series.

Fitment & Compatibility

Before buying, confirm your engine model number (stamped on the blower housing or valve cover). This carb fits Briggs & Stratton engines with the listed OEM numbers—if your engine uses a different carb (e.g., Nikki or Walbro), it won’t match. Measure the mounting bolt spacing (typically 2.5 inches center-to-center) and the intake flange shape. It’s an aftermarket part, not OEM, so expect slight differences in gasket thickness or fuel line routing. Works on most push mowers with these engines; not for zero-turn or riding mower engines.

Key Things to Know

• Installation difficulty: Moderate. You’ll need to remove the air filter housing, fuel line, and linkage. Keep the old linkage parts—this kit often lacks throttle/governor springs or exact brackets.
• Quality variance: Some users report needing to clean out machining debris or adjust the float height before installing. Inspect the gaskets for warping.
• 13-piece kit includes: Carburetor, gaskets, fuel filter, fuel line, and mounting hardware. No air filter or spark plug included.
• Common gotcha: The included fuel line may be too short or stiff for your mower. Use the old line if it’s in good shape. Also, the carb may need a slight idle mixture screw adjustment (turn 1.5 turns out as a starting point).

Should You Buy It

If your Briggs engine is hard-starting, surging, or leaking fuel and you’ve confirmed compatibility, this is a budget-friendly fix (under $20). It’s ideal for DIYers comfortable with basic small-engine work. Avoid if you want OEM precision or need a carb for a non-listed engine series—spend more on a genuine Briggs replacement instead.