{"product_id":"rbk106-pb250-carburetor","title":"RB-K106 PB250 Carburetor Tune-Up Kit - Fits Echo PB250LN PB-250 ES250 Leaf Blower A021003660 Carb","description":"\u003ch2\u003eRB-K106 Carburetor Tune-Up Kit\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Air-Fuel Calibration:\u003c\/strong\u003e Specifically jetted for the Echo 25.4cc engine to ensure a stable idle and maximum airspeed for handheld clearing tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Response Diaphragm System:\u003c\/strong\u003e Features an internal metering diaphragm designed to maintain consistent fuel delivery regardless of the blower's angle or vibration level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-In-One Restoration Kit:\u003c\/strong\u003e A comprehensive maintenance set including a pre-calibrated carburetor, high-flow air filter, premium spark plug, and a complete fuel line and gasket set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEthanol-Resistant Internals:\u003c\/strong\u003e Equipped with updated needle valves and high-grade gaskets engineered to resist the \"gumming\" and hardening effects of modern ethanol-blended fuels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Integration:\u003c\/strong\u003e Designed as a \"drop-in\" replacement for the RB-K106 series, ensuring a perfect fit for factory throttle linkages and air box mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplaces \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEcho:\u003c\/strong\u003e A021003660, A021003661\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZama:\u003c\/strong\u003e RB-K106\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cp\u003eThis carburetor kit is the primary replacement for Echo's popular lightweight handheld blower and shredder-vac series. Key compatible models include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEcho PB Series:\u003c\/strong\u003e PB-250, PB-250LN (Low Noise model).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEcho ES Series:\u003c\/strong\u003e ES-250 (Shred 'N' Vac).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Early PB-250 models may use a different carburetor (RB-K106 is the most common). Always verify the \"RB\" number stamped on the side of your original carburetor body.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Surging or \"Hunting\":\u003c\/strong\u003e The engine RPM fluctuates wildly at a steady throttle, often caused by a lean fuel mixture due to a restricted internal main jet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard Starting \/ No Start:\u003c\/strong\u003e The blower requires multiple pulls or starting fluid to fire, confirming the carburetor's internal fuel pump is no longer drawing fuel from the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBogging Under Load:\u003c\/strong\u003e The engine idles fine but dies as soon as you pull the trigger for full throttle, indicating a clog in the high-speed circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Leaks:\u003c\/strong\u003e Gasoline drips from the air filter housing or the primer bulb area while the engine is off, posing a fire hazard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrittle Primer Bulb:\u003c\/strong\u003e The clear bulb has yellowed or cracked, allowing air to enter the fuel system and preventing proper priming.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinkage Geometry:\u003c\/strong\u003e Use your phone to take a photo of the throttle cable and return spring setup before disassembly. The \"Z-bend\" on the throttle cable must be seated correctly for full engine speed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlush the Tank:\u003c\/strong\u003e If the old carburetor was clogged with \"green\" varnish, you must drain the gas tank and replace the fuel lines with the included kit to prevent immediate contamination of the new unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Orientation:\u003c\/strong\u003e Carefully align the mounting gaskets. If the pulse hole on the gasket does not line up with the hole on the engine block, the carburetor will not pump fuel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrime the System:\u003c\/strong\u003e Once installed, press the primer bulb 5–10 times until you see fuel circulating through the clear return line back into the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the Spark Plug:\u003c\/strong\u003e Always check the gap on the included spark plug before installation (typically 0.024\" to 0.026\") to ensure a strong, consistent spark.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BlueStarsParts","offers":[{"title":"Default Title","offer_id":45369710051517,"sku":"AZ00104023","price":14.04,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2576\/7548\/files\/AZ00104023_1_5d80934d-ca1b-480e-ac6c-11be1f08d3f6.jpg?v=1762246419","url":"https:\/\/bluestarspartstrend.com\/products\/rbk106-pb250-carburetor","provider":"BlueStars Parts","version":"1.0","type":"link"}