616-446 Stens Carburetor, Zama C1M-S267.  For Stihl FS56RC FS70R FS56 FS70 FS40 FS56C FC70 HT56C KM56 FC56 FS50 FS70C HT56 KN56 KM56C Trimmer

Replaces Stihl 4144 120 0608

Fits Stihl FS40 FS50 FS56 FS70 FC56 FC70

For rebuild kit use RB-155

SR-5(P)