Stihl 11211200611 Carburetor Assembly

This carburetor assembly replaces Stihl OEM part number 1121 120 0611 (11211200611). It is a Walbro WT-194-1 / WT-426B series diaphragm carburetor designed for Stihl professional and farm chainsaw models. The unit meters fuel and air mixture for 2-stroke gasoline engines ranging approximately 42cc to 45cc displacement. Constructed with an aluminum alloy body, stainless steel throttle shaft, and fluoropolymer diaphragms resistant to modern ethanol-blended fuels. Features integrated choke lever and primer bulb mounting points. Direct interchange for Walbro WT-194, WT-194-1, WT-426B and Tillotson 40-HU-136A carburetor models. Stens aftermarket reference 615-454. Verified fitment requires matching the Walbro or Tillotson number stamped on the original carburetor body due to production running changes.