Replacement Carburetor RBK106 (part number 021003660) for ES250 PB250 PB250LN blowers Overview This directfit replacement carburetor RBK106 (part number 021003660) is intended for use with ES250, PB250, and PB250LN backpack blowers. It performs the fuel and air metering functions required for reliable twostroke engine operation and is a practical option when the original carburetor is worn, damaged, or clogged. Key benefits Correct function: Controls fuel and air mixture to support consistent starting, stable idle, and predictable throttle response. Compatibility: Designed to the original carburetor with the same mounting points and connections for ES250, PB250, PB250LN blower models (part number 021003660). Reduced downtime: Quick replacement option to get equipment back in service without lengthy repairs. Service friendly: Fits standard fuel line and linkage arrangements for these blower models, simplifying installation and adjustment. What this part does Regulates fuel flow to the engine and mixes fuel with air in the proper ratio for combustion. Replaces worn or malfunctioning carburetor components that cause hard starting, rough idle, loss of power, or excessive smoke. Compatibility and identification Replacement carburetor model: RBK106 Reference part number: 021003660 Compatible with blower models: ES250, PB250, PB250LN Installation notes Intended as a direct replacement. Basic hand tools are typically sufficient for removal and installation. Inspect and fuel lines, primer bulb, and gaskets as needed during installation. Follow the engine service manual for final idle and mixture adjustments. Practical use scenarios Homeowner maintenance: a clogged or leaking carburetor on a backyard blower to restore normal starting and performance. Landscape professional: Keep a replacement carburetor on hand to minimize downtime during peak seasons for equipment in the field. Small : Use as a stock replacement part for service calls on ES250 and PB250 series backpack blowers. What to check before Confirm your blower model and the original part number 021003660 to ensure proper fit. If the blower has been modified or retrofitted, verify mounting and linkage compatibility before installation. This replacement carburetor provides a straightforward option for restoring proper fuel metering on compatible backpack blower models, helping maintain dependable operation and reduce time out of service.