Carburetor for Stihl Chainsaw. Zamak C1M-S267D. Models: FS 40 - 4144 FS 50 (4144) FS 56 (4144) FS 56 C-E Z FS 56 R FS 56 RC-E Z FS 70 C-E FS 70 RC-E HT 56 C-E KM 56 RC-E