799583 593261 Carburetor Kits for B&S 595656 591979 591160 08P502 8P502 09P602 9P602 300E 450E 500E 550EX Series Engines with 799579 Filter 595660 Cover

What It Is

This carburetor kit replaces the fuel metering assembly on Briggs & Stratton engines from the 300E, 450E, 500E, and 550EX series. It’s designed for small to mid-sized walk-behind mowers, pressure washers, and generators using single-cylinder OHV engines.

Fitment & Compatibility

Engines: Fits B&S models 08P502, 8P502, 09P602, 9P602, and any engine using OEM carburetor part numbers 595656, 591979, 591160.
What to check before buying:

• Confirm your engine’s model number (stamped on valve cover or blower housing) – not just mower brand/deck size.
• This is an aftermarket kit, not OEM Briggs & Stratton. It includes the 799579 air filter and 595660 cover, but verify your existing gasket and fuel line dimensions match.
• Measure the mounting bolt spacing and intake flange width – some 550EX variants use a slightly different bore.
• Not compatible with Intek, Vanguard, or larger twin-cylinder engines.

Key Things to Know

• Quality variance: The included filter and cover are functional but may feel less robust than OEM. Inspect the gasket closely for warping.
• Install difficulty: Moderate – you’ll need to remove the old carburetor, swap the metering diaphragm, gaskets, and clean the fuel bowl. No jet adjustment required.
• Common gotcha: The kit doesn’t include a new fuel line or primer bulb. If your engine has a purge primer, replace it separately to avoid air leaks.
• Tuning note: If the engine runs rich after installation, check the float height (should be level with the bowl gasket surface) – aftermarket floats sometimes need tweaking.

Should You Buy It

If you’re comfortable with basic carburetor work and your B&S 300E–550EX engine runs rough, won’t start, or surges under load, this kit is a cost-effective fix. It’s best for DIYers who don’t want to pay $40+ for OEM parts, but skip it if you need exact fitment for a professional/commercial mower – the filter and cover quality may not hold up under daily use.