The Tecumseh 640065A Engine Carburetor helps deliver the proper air-fuel mixture for smooth and reliable engine operation. Designed as a replacement carburetor, it mixes fuel with incoming air and supplies the prepared mixture to the engine for combustion. Proper carburetor function helps support consistent starting, steady engine performance, efficient fuel use, and reliable power de... https://www.wholetoolbox.com/tecumseh-640065a-lawn-mower-carburetor/640065A.html