OEM Carburetor / Zama C1M-K76Pack Size:1Echo A021000770, Echo A021000771, Zama C1M-K76J. Thomas C1M-K76, Rotary 11973, Rotary 11971, Rotary 615448, Rotary 615043Echo PB610 and PB620 blowers with serial #09001001 and higher Not compatible with greater than 10% ethanol fuel