Directfit replacement carburetor for HMSK100159340V and HMSK100159349V 4cycle engines, part number 640349. Designed to restore reliable fuel delivery and consistent engine performance for compatible small engines. Key benefits Restores reliable starting and steady idle by replacing worn or clogged carburetor components. Directfit replacement that matches original mounting points and throttle linkage for straightforward installation. Returns proper fuel and air metering to help engines run smoothly under load and at idle. Reduces troubleshooting time and equipment downtime during routine maintenance or . What it does Functions as the fuel metering device for compatible 4cycle engines, controlling the mix of air and fuel delivered to the combustion chamber. Includes the ports and linkages to the original carburetor with minimal modification. Compatibility and identification Compatible with engine models HMSK100159340V and HMSK100159349V. Identified by part number 640349 for clear matching to the original component. Fit and performance notes Engineered to meet original equipment fit and function so mounting, throttle, and choke connections align with existing hardware. Designed to restore factory fuel delivery characteristics for dependable starts, smoother idling, and consistent throttle response. For results, install with correct gaskets and settings. Clean fuel passages and fuel filter are recommended during replacement. Typical applications and use scenarios Seasonal tuneup: an old or varnished carburetor during spring maintenance on walkbehind mowers or other small engine equipment to restore reliable starting after storage. and toservice: Swap in this carburetor when an engine exhibits poor idle, hard starting, or fuel flow problems caused by a failing carburetor. Preventive maintenance kit: Keep as a spare part for field service or emergency repairs on compatible 4cycle engines to minimize downtime. Additional information Intended as a replacement component for the listed engine models and part number 640349. Confirm compatibility with your equipment model and mounting configuration before . If you are not experienced with small engine , consider professional installation to ensure correct adjustment and safe operation.