699831 Carburetor Tune Up Kit Fits for Briggs and Stratton 289707 28D702 28D707 694941 283707 283702 286702 286707 289702 28M706 284702 284707 284777 12 12.5 13 HP Lawn Mower Engines Carb Parts

What It Is

This is a replacement carburetor tune-up kit designed for Briggs & Stratton single-cylinder engines in the 12–13.5 HP range, commonly used on walk-behind lawn mowers and small tractors. It includes gaskets, seals, and carburetor components to restore fuel delivery and idle performance.

Fitment & Compatibility

Before buying, confirm your engine’s model number (e.g., 28D702, 289707, 283707) stamped directly on the valve cover or blower housing. This kit fits the listed models but not all Briggs engines—verify the exact model number, not just horsepower. It is an aftermarket replacement, not OEM Briggs & Stratton. Measure the carburetor mounting bolt spacing (typically 2.5–3 inches) to ensure it matches your engine’s intake. Works with both side-valve and overhead-valve engines in that HP range.

Key Things to Know

• Quality varies – Aftermarket gaskets may be thinner or less durable than OEM; inspect for warping before install.
• Installation difficulty – Moderate; requires removing the carburetor, cleaning the bowl and jets, and reassembling with new seals. A carburetor cleaning spray and small screwdriver set are helpful.
• Common gotcha – The kit may not include the main jet or needle valve; check your old carb’s condition. If the bowl or float is corroded, you may need a full carburetor replacement instead.
• Fuel system prep – Replace the fuel filter and drain old gas to prevent debris from clogging the new kit.

Should You Buy It

If your Briggs engine is hard-starting, surging, or leaking fuel from the carb, this kit is a cost-effective fix for restoring idle and throttle response. It’s best for DIYers comfortable with basic carburetor disassembly and cleaning. For heavily corroded or damaged carbs, a full replacement is more reliable.