Compatible Carburetor Replacement for Briggs & Stratton 796109 591731 594593 14.5hp - 21hp Carb

What It Is

This is an aftermarket carburetor replacement for Briggs & Stratton engines in the 14.5hp to 21hp range, commonly found on riding mowers, zero-turn mowers, and lawn tractors. It replaces OEM part numbers 796109, 591731, and 594593 to restore fuel flow and fix starting/running issues.

Fitment & Compatibility

Before buying, check your engine’s model number (stamped on the valve cover or blower housing). This carb fits Briggs & Stratton single-cylinder and V-twin engines with a vertical shaft and a 1-inch bore. It’s not for horizontal shaft engines (e.g., pressure washers, generators). Measure the mounting flange hole spacing: it should be 2.5 inches center-to-center. Most riding mower brands (Craftsman, Husqvarna, John Deere, Troy-Bilt) with compatible Briggs engines will work, but double-check your deck size isn’t a factor—the carb doesn’t care about deck width. If your engine has a fuel pump, you may need to reuse your old fuel line fitting.

Key Things to Know

• Quality is hit-or-miss: At $28, this is a budget part. Expect plastic components and possible gasket leaks if not torqued evenly. Check for debris in the bowl before installing.
• Installation difficulty is moderate: You’ll need basic tools (screwdrivers, socket set) and about 30-60 minutes. Watch a video for your specific engine model—jet adjustment and throttle linkage setup vary.
• Common gotcha: The included gaskets may be too thin, causing air leaks. Use OEM gaskets or add a thin layer of sealant. Also, the choke linkage might need bending to align properly.
• No warranty support: As a compatible part, returns are through the seller only. Test fit before final assembly.

Should You Buy It

Yes, if you’re on a tight budget and comfortable with minor adjustments and potential tweaks. It’s a good stopgap for a non-running mower, but if you want long-term reliability or have a complex engine (e.g., with a fuel solenoid or electronic choke), spend more on an OEM or higher-rated aftermarket carb. For most DIYers with a simple single-cylinder Briggs, this will get you cutting again.