The STIHL carburetor 4140 120 0634 is a high-quality replacement part designed specifically for lawn mowers such as the FS 46, KM55R, KM56RC-E, and FS45 D. Known for its durability and precision engineering, STIHL carburetors ensure optimal performance and reliability for your outdoor power equipment. With this carburetor, you can trust that your lawn mower will run smoothly and efficiently, providing you with a healthy and well-groomed garden or yard. 4140 120 0610