846109 305447 Carburetor Replacement for Brigs & Straton 16 Hp Vanguard Engines 303442 303447 Carb with Fuel Filter 846082 809011 844988 844041 808253 807905 807801 807943

What It Is

This is an aftermarket carburetor replacement for Briggs & Stratton 16 HP Vanguard V-Twin engines (models 303442, 303447, and related). It includes a fuel filter and is designed for lawn tractors, zero-turn mowers, and other small engine equipment using those engines.

Fitment & Compatibility

Before buying, confirm your engine’s model number (stamped on the blower housing or valve cover). This carburetor directly replaces OEM part numbers: 846109, 305447, 846082, 809011, 844988, 844041, 808253, 807905, 807801, 807943. It fits Briggs & Stratton Vanguard 16 HP engines with a horizontal shaft (most common on riding mowers). Check your carburetor mounting flange bolt spacing (typically 2.75” center-to-center) and fuel inlet orientation (side or bottom) to match your intake. Not compatible with vertical shaft engines or older non-Vanguard models.

Key Things to Know

• Quality variance: Aftermarket carburetors often have slightly thinner gaskets or looser tolerances than OEM. Check for debris in the bowl before installation—some units ship with machining residue.
• Installation difficulty: Moderate. You’ll need to remove the air filter housing, fuel line, and throttle/governor linkages. Label or photograph linkages before disconnecting—reconnection is the trickiest part.
• Common gotchas: The included fuel filter may be smaller than your original—use your old filter if fit is tight. Adjust the idle mixture screw (usually 1.5 turns out from lightly seated) after install. If the engine hunts or stalls, check for vacuum leaks at the intake gasket.
• No adjustments needed: Unlike some aftermarket carbs, this one typically includes pre-set jets, but fine-tuning may still be required for altitude or ethanol fuel.

Should You Buy It

Right for you if you need an affordable, functional replacement for a failing or clogged Vanguard carburetor and are comfortable with basic small-engine repair. Not ideal if you want OEM-fit perfection or if your engine has a specific altitude or emission-control variant—then stick with a genuine Briggs & Stratton unit. For the price, it’s a solid budget option for DIYers.