The Tecumseh 640172 Lawn Mower Carburetor helps maintain the proper fuel and air mixture for smooth, reliable engine operation and consistent mowing performance. Designed as a replacement carburetor, it regulates fuel delivery to support dependable starting, steady idling, and proper combustion. Replacing a worn or faulty carburetor can help address common engine issues such as hard s... https://www.wholetoolbox.com/tecumseh-640172-lawn-mower-carburetor/640172.html