Rotary 12774. Zama GND-31 Carburetor Kit . Fits Echo PB 4600 & PB 6000 w/C1M Carburetor. Similar to RB-61 for complete kit.C1M-K24 A-B, C1M-K25 A-B, C1M-K37, A-D, C1M-K49 A-C, C1M-K76

Replaces
ZAMA: GND-31