OEM Carburetor / Walbro WYJ-192-1Pack Size:1Echo 12300057730, Echo 12300057731, Walbro WYJ-192-1, Walbro WYJ-192J. Thomas WYJ-192, NHC 203-5099, Oregon 50-603, Rotary 11164Echo SRM2601 trimmers Not compatible with greater than 10% ethanol fuel