Part number 640065A replacement carburetor designed to restore reliable fuel delivery and engine performance for specified small engines. Key benefits Restores starting, idle stability, and throttle response by supplying the correct fuel and air mixture to the engine. Direct replacement for the listed part number and engine models, reducing installation time and fitment guesswork. Helps resolve common carburetorrelated issues such as hard starting, rough idle, stalling, and poor power under load. What this part does Controls fuel metering and idle mixture so the engine runs smoothly across operating speeds. Replaces worn or damaged carburetor components to the engine to expected performance and responsiveness. Matches the original mounting pattern and connection points for the compatible engines. Compatibility and specifications Part number: 640065A (also referenced as compatible with 640065) Engine models: OHV110, OHV115, OHV120 Engine ratings: 13.5 HP, 14 HP, 15 HP Equipment fit: Compatible with MTD Yard Machine engine models 520952 and 056316 Quantity: 1 carburetor Installation and performance notes Designed as a direct replacement for the listed part numbers and mounting configuration; basic hand tools are typically sufficient for installation. After installation, follow normal engine breakin and adjustment procedures, and verify choke and idle settings for operation. Use with proper fuel and air filter maintenance to maximize service life and maintain consistent performance. Typical applications Lawn tractor : a failing carburetor on a tractor equipped with a 13.5 to 15 HP Tecumseh OHV engine to restore mowing performance. Seasonal maintenance: Swap the carburetor on a lawn tractor or garden machine that has developed hard starting or rough idle after winter storage. Small engine restoration: Use when refurbishing a mower or yard machine that uses the specified Tecumseh engine models and MTD Yard Machine engine numbers. Why choose this replacement Provides a straightforward solution when the original carburetor is worn, leaking, or no longer functioning correctly. Ensures compatibility with the specified engine and equipment models to simplify planning. Returns reliable fuel delivery and engine behavior so routine outdoor work can continue with minimal downtime. Notes Confirm part number and engine model before to ensure correct fitment. Professional installation is recommended if you are not familiar with carburetor adjustment and small engine maintenance.