This carburetor is designed to work with STIHL mowers FS38, FS45, FS55, FS74, FS76, FS80, and FS85. It is compatible with these models and is suitable for use with them. The carburetor is a crucial component for the proper functioning of the mower and is responsible for the conversion of fuel into power. It is important to note that this carburetor is made specifically for STIHL mowers and is not compatible with other brands. This is an essential part for anyone who owns one of the listed mowers and is looking for a reliable replacement carburetor. The product has been designed to meet the specifications of the STIHL mowers and will ensure that your mower runs smoothly and efficiently.