Briggs and Stratton 799584 Carburetor

What It Is

The Briggs and Stratton 799584 Carburetor mixes fuel and air for combustion in single-cylinder engines, primarily used in walk-behind mowers, riding mowers, and small tractors. It’s a direct OEM replacement for engines with a 1- or 2-bolt mounting pattern.

Fitment & Compatibility

Before buying, check your engine’s model number (stamped on the blower housing or valve cover). The 799584 fits many Briggs engines from the 400000, 440000, 450000, 460000, and 490000 series, typically with 7.5–10 ft-lb torque ratings. It replaces older part numbers 790726, 791859, and 799583. Measure the mounting bolt spacing: this carb uses a 2.5-inch center-to-center bolt pattern. It does not fit engines with a 3-bolt flange or non-Briggs brands like Kohler or Honda. Verify your mower’s deck size (usually 21–42 inches) is compatible, but the carb itself is engine-specific, not deck-specific.

Key Things to Know

• Quality: OEM part from Briggs & Stratton, so it matches factory specs. No gasket or fuel line included—buy separately (e.g., Briggs 499816 gasket kit).
• Installation: Moderate difficulty. You’ll need a socket set and a small screwdriver. Clean the intake manifold and replace the gasket to prevent leaks. Adjust the idle speed screw after install (factory preset, but fine-tuning may be needed).
• Common gotchas: The carb comes with a fixed main jet—no adjustment for altitude or heavy load. If your engine has a plastic fuel bowl, this carb uses a metal bowl; ensure the bowl nut is snug but not overtightened (can crack). Check your fuel filter and lines for debris before installing.
• Warranty: 1-year limited from Briggs. Save your receipt and original packaging.

Should You Buy It

If you need a direct OEM replacement for a Briggs engine with a 2-bolt mount and want reliability without tuning hassle, this is a solid choice. It’s best for DIYers with basic mechanical skills and a matching engine series. Skip it if you need an aftermarket budget option or have a non-Briggs engine.