OEM Carburetor Kit / Walbro K20-WYJPack Size:1Walbro K20-WYJJ. Thomas W10-W11, J. Thomas K20-WYJ, NHC 203-5517, Oregon 49-882, Oregon 49-882-0, Prime Line WK20-WYJ, Rotary 13263, Sunbelt WAL-K20-WYJ, Tilton K20-WYJWalbro WYJ carburetors Not compatible with greater than 10% ethanol fuel