Replacement carburetor model 640084B for Tecumseh 4 and 5 HP snow blower engines. Designed as a direct replacement for a range of OEM part numbers to restore proper fuel delivery and engine performance on compatible snow blowers. Key benefits Direct replacement for multiple OEM part numbers: fits 632107A, 632107, 640084, 640084A, 640105, 640299. Compatible with Tecumseh 4 HP and 5 HP engines used on many snow blowers. Broad equipment compatibility: designed to work with MTD and TORO snow blower models that use Tecumseh engines, including models 521, HSSK40, HSSK50, HS50, LH195SA, 38050, 38052, 38072, and 38040. Restores engine start and idle performance: addresses common carburetor symptoms such as hard starting, erratic idle, and fuel flooding by providing correct fuel metering and consistent airflow. Easy to install: engineered to match the OEM mounting footprint and fuel inlet locations for a straightforward replacement without modification. Reliable operation: precision machined passages and quality components help maintain consistent fuel flow across normal operating conditions. What it does Replaces worn or damaged carburetor assemblies to reestablish correct air fuel mixture for Tecumseh 4 HP and 5 HP engines on compatible snow blowers. Provides the ports and linkages to interface with factory throttle and choke controls. Typical applications Seasonal : a failing carburetor on a 5 HP Tecumseh snow blower before winter to ensure reliable snow removal. Maintenance and restoration: restore proper engine function on an MTD model that shows hard starting or rough idle after storage. Workshop spare: keep a replacement carburetor on hand for quick repairs to Toro or MTD snow blowers that use the listed Tecumseh engine models. Compatibility checklist Carburetor model: 640084B OEM part numbers: 632107A, 632107, 640084, 640084A, 640105, 640299 Engine sizes: 4 HP and 5 HP Tecumseh engines Snow blower models: 521, HSSK40, HSSK50, HS50, LH195SA, 38050, 38052, 38072, 38040 Notes Confirm your engine model number and OEM part number before ordering to ensure correct fitment. Installation typically requires basic hand tools and standard small engine maintenance procedures.