Carburetor for Briggs & Stratton 799727 698620 794572 287707 287777 28N707 28N777 28P777 28Q777 14HP 15HP 16HP 17HP 17.5 HP 18HP Lawn Mower Engines, Carb with Tune-Up Kit

What It Is

This is an aftermarket carburetor replacement (with a tune-up kit including gaskets, fuel filter, and spark plug) designed for Briggs & Stratton single-cylinder engines in the 14–18 HP range, commonly found on riding mowers, lawn tractors, and zero-turn mowers from brands like MTD, Troy-Bilt, Craftsman, Husqvarna, and John Deere.

Fitment & Compatibility

Before buying, verify your engine’s model number (e.g., 28N707, 28P777) – this carb fits Briggs models 799727, 698620, 794572, 287707, 287777, 28N707, 28N777, 28P777, and 28Q777. Check your engine’s type and code numbers as well; variations within the same model series can affect mounting holes, choke linkage, and gasket alignment. Measure the carb base bolt spacing (typically 2.25” center-to-center) and the fuel inlet diameter (usually 5/16” or 1/4”). This is an aftermarket part, not OEM, so fitment may require minor adjustment of linkages or throttle cable.

Key Things to Know

• Quality varies – Some users report the included gaskets and fuel filter are adequate, but the spark plug may be generic; consider using a genuine Champion plug for reliability.
• Installation difficulty – Moderate. Expect to clean the mounting surface, transfer your old choke and throttle linkage springs, and possibly bend the governor arm to match. A carburetor adjustment tool (for the main jet) is helpful.
• Common gotchas – The carb may come with a pre-set idle mixture; you may need to adjust it (turn out 1.5 turns initially). Fuel line routing and air filter housing alignment can be tight on some decks – have a small screwdriver and pliers ready.
• Tune-up kit contents – Includes air filter, spark plug, and fuel filter, but the air filter may not fit all air box types; check your existing filter shape.

Should You Buy It

This is a solid budget-friendly option if your OEM carb is leaking, clogged, or unrebuildable and you’re comfortable with basic engine work. It’s best for DIYers who want a quick fix for a non-starting or rough-idling mower, but if you want guaranteed fit and longer lifespan, consider an OEM Briggs & Stratton carb ($40–60).