The MTD 951-05021 Carburetor Assembly helps deliver the proper air-fuel mixture for smooth and reliable engine operation. Designed as a replacement carburetor assembly, it mixes fuel with incoming air and supplies the mixture to the engine for combustion. Proper carburetor function helps support consistent starting, steady engine performance, efficient fuel use, and reliable power del... https://www.wholetoolbox.com/mtd-951-05021-carburetor-assembly/951-05021.html