Ruixing OEM 799866 Carburetor for Briggs and Stratton 6.75hp 190cc 675 Series 725EX Engine Craftsman Troy Bilt TB230 Toro 22 Recycler Lawnmower Carburetor 799866 790845 799871 794304

What It Is

This is an aftermarket carburetor replacement for Briggs & Stratton 6.75hp (190cc) engines in the 675 Series and 725EX families. It’s designed for walk-behind mowers like the Craftsman, Troy-Bilt TB230, and Toro 22 Recycler, supplying the correct fuel-air mix to keep the engine running.

Fitment & Compatibility

Before buying, verify your engine’s model number (stamped on the valve cover or blower housing). This carb fits Briggs 675 Series (e.g., 121Q02) and 725EX (e.g., 121Q05) engines. Not for older 6.75hp engines (e.g., 500E or 550EX) – those use different carburetors. Also check your mower’s deck size: it’s compatible with 21–22-inch decks on Craftsman, Troy-Bilt TB230, and Toro 22 Recycler. Measure the mounting hole spacing (2.5 inches center-to-center) and confirm your air filter and fuel line connections match (3/16-inch fuel line, 1.25-inch air filter neck).

Key Things to Know

• Quality variance: This is an aftermarket part, not OEM. Some users report needing to adjust the idle mixture screw (turn 1.5 turns out initially) or clean out debris from the bowl after installation.
• Installation difficulty: Moderate. You’ll need a socket wrench, pliers, and possibly a carburetor gasket. Expect 30–60 minutes if you’re handy; first-timers may need a video guide.
• Common gotchas: The supplied gasket may be thin – use a thin layer of gasket sealer if it doesn’t seal. Also, the fuel bowl nut can be overtightened (hand-tight + 1/4 turn is enough). Old fuel lines may crack; replace them if stiff.
• Performance: Usually restores start-up and idle, but some users note slight hesitation under load compared to OEM. Clean the old fuel tank and line before installing to prevent debris from clogging the new carb.

Should You Buy It

If your Briggs 675 or 725EX engine runs rough, won’t start, or stalls after sitting, this carb is a solid, cost-effective fix. It’s not OEM quality, but at $28.99 it’s a good value for DIYers who can handle a simple swap and minor tuning. Avoid it if you want a plug-and-play install or have an older engine variant.