Replacement Carburetor for Tecumseh 4Cycle Engines Model HMSK105159914B and HMSK105159914C, Carburetor 640349 Product summary This carburetor is a direct replacement designed for use with Tecumseh HMSK105159914B and HMSK105159914C 4cycle engines, part number 640349. It restores correct fuel metering and supports reliable engine starting and operation for the specified engine models. Key benefits Restores reliable fuel delivery and consistent idle for 4cycle engines used in small equipment Solves issues such as hard starting, stalling, rough idle, and poor throttle response when the original carburetor is worn or clogged Built to match the mounting and linkage layout of the specified HMSK105 engine models for straightforward installation Helps extend the usable life of your equipment by addressing common carburetorrelated performance problems What it does Meter fuel and air to the engine for proper combustion in 4cycle operation Provides adjustable idle and throttle response consistent with the original equipment configuration Replaces a worn or damaged carburetor to restore engine performance and drivability Compatibility and fit Compatible with Tecumseh engine models HMSK105159914B and HMSK105159914C Identified as carburetor part number 640349 for the compatible engines Designed to fit the standard mounting pattern and throttle/choke linkages used on the listed engine models Key attributes Function: Fuel metering and air/fuel mixture control for 4cycle small engines Compatibility: HMSK105159914B, HMSK105159914C Part number reference: 640349 Design: Compact replacement unit intended to match original mounting and control linkages Performance: Restores expected engine start, idle stability, and throttle response when installed on compatible engines Typical applications or rebuild of a walkbehind mower equipped with a HMSK105159914B or HMSK105159914C engine Maintenance replacement during seasonal tuneup for garden tractors or other small engine equipment using the listed engines Replacement of a damaged or nonfunctional carburetor on utility equipment to restore reliable operation Installation notes Intended as a replacement for the listed engine models; verify part numbers and engine model stamping before Basic mechanical skills and common hand tools are typically sufficient for installation Inspect fuel lines, filters, and gaskets during replacement to ensure performance after installation If your equipment uses a HMSK105159914B or HMSK105159914C 4cycle engine and shows signs of carburetorrelated performance issues, this carburetor 640349 provides a focused replacement option to restore fuel metering and engine operation.