799866 Carburetor Kit for Briggs & Stratton 6.75HP 190cc 675 Series 725EX Engine, Fits Craftsman Troy-Bilt TB230 Toro 22" Recycler Lawn Mower, Replaces 790845 799871 794304

What It Is

This is a complete carburetor kit designed to replace the fuel delivery system on Briggs & Stratton 6.75HP 190cc engines from the 675 Series and 725EX family. It’s intended for push mowers like the Craftsman, Troy-Bilt TB230, and Toro 22" Recycler that use these engines.

Fitment & Compatibility

Before buying, confirm your engine model number (e.g., 12A-xxx-xxxx) on the Briggs & Stratton label under the fuel tank or air filter cover. This kit replaces OEM part numbers 790845, 799871, and 794304, but it’s an aftermarket unit, not genuine Briggs. It fits 6.75HP 190cc engines with a vertical shaft and float-style carburetor—check that your carb mounting bolt spacing matches (typically 2.75" center-to-center). It will not work on engines with a different displacement, side-valve designs, or older 5HP models.

Key Things to Know

• Quality varies – Some users report gaskets shrink or fuel inlet threads are slightly loose. Inspect the kit before installing; keep your old carb’s metal parts if needed.
• Installation difficulty – Moderate. You’ll need to remove the air filter, fuel line, and carb bolts. Clean the mounting surface and use a torque wrench (80-100 in-lbs) to avoid stripping the plastic intake.
• Common gotcha – The included fuel line may be too short or stiff for some mower frames. Have a 6" piece of 1/4" ID fuel line on hand.
• Tuning required – After installation, adjust the idle mixture screw (if present) and check for leaks. A new spark plug is recommended to rule out ignition issues.

Should You Buy It

If your Briggs 6.75HP engine is surging, hard-starting, or running rich, this kit is a cost-effective fix (about $17) for a worn carburetor. It’s best for DIYers comfortable with basic engine work—skip it if you want a drop-in OEM replacement or if your engine has damage beyond the carb (e.g., bad valves or rings).