This carburetor assembly is a genuine MTD part, sold individually. This carburetor assembly can be used as a replacement part in a variety of outdoor appliances including lawn mowers, string trimmers, and edgers. The purpose of a carburetor assembly for one of these outdoor appliances is to prepare a mixture of fuel and air in the proper ratio so that the mixture can be fed into the spark plugs to ignite them and to power on the engine as a result. If the engine is not starting, is hard starting, or if the spark plugs are not igniting properly, the carburetor may be damaged and will require replacement.This is a genuine OEM replacement part sourced directly from the manufacturer. It is sold individually. This carburetor assembly is compatible with the following outdoor appliance brands: MTD, Craftsman, Toro, Cub Cadet, Troy-Bilt, Murray, Yard Machines, Huskee, Bolens, Yard Man, and MasterCut.