Replacement Carburetor for HMSK100 4Cycle Engine Models 159277W and 159284W Part 640349 Overview This directreplacement carburetor is designed for HMSK100 4cycle engine models with part numbers 159277W and 159284W, and corresponds to replacement part 640349. It restores proper fuel delivery and airfuel mixture to engines to reliable operation after wear, damage, or clogging. Key benefits Accurate fit and compatibility: Matches the mounting and connection layout for HMSK100 4cycle engines using part numbers 159277W and 159284W, making installation straightforward. Restores engine performance: Replaces worn or damaged carburetors to resolve hard starting, rough idle, and poor throttle response caused by fuel delivery problems. Reliable construction: Built with durable components and quality seals to withstand typical small engine operating conditions and provide consistent fuel metering. Simple installation: Designed as a bolton replacement that requires common hand tools and basic mechanical skills; no modifications to the engine required in most cases. Cost effective solution: Allows of outdoor power equipment without replacing the entire engine, reducing downtime and expense. Function and attributes Function: Controls fuel and air mixture for proper combustion in 4cycle small engines, regulating idle, throttle response, and fuel flow. Compatibility: For HMSK100 4cycle engine model numbers 159277W and 159284W; replacement part number 640349. Materials and durability: Constructed from metal components with durable seals and gaskets to resist typical fuel exposure and vibration. Performance: Restores consistent fuel metering for stable idle, easier starting, and improved throttle response when original carburetor performance has degraded. Size and connections: Designed to match original carburetor mounting points and fuel line fittings for direct replacement on compatible HMSK100 engines. Practical applications Lawn and garden equipment : a failing carburetor on a walkbehind mower or garden tractor equipped with an HMSK100 4cycle engine to restore reliable starting and steady idling. Seasonal maintenance for portable equipment: Install during spring or fall maintenance on generators, pressure washers, or other outdoor power equipment to eliminate issues caused by old fuel or clogged passages. Onsite for small engine service shops: Keep a matching replacement carburetor on hand to quickly service customer equipment that uses HMSK100 4cycle engines with part numbers 159277W or 159284W. What it solves Eliminates fuel flow blockages and worn internal passages that cause poor starting and performance. Replaces damaged mounting flanges, throttle linkages, and seals that can lead to leaks or inconsistent engine behavior. Provides a practical alternative to full engine replacement by restoring normal carburetion. Notes for installers Verify engine model and part numbers 159277W or 159284W before ordering to ensure compatibility with replacement part 640349. Clean surrounding surfaces and fuel lines during installation to prevent contamination. Adjust idle and mixture per engine service instructions after installation for performance. This replacement carburetor provides a practical, compatible solution for restoring fuel delivery and reliable operation in HMSK100 4cycle engines that use part numbers 159277W or 159284W, corresponding to part 640349.