OEM Carburetor / Walbro WG9-1Pack Size:1Husqvarna 503 28 12-17, Husqvarna 503 28 12-70, Partner 503 28 12-17, Walbro WG-9-1, Walbro WG 9Husqvarna K1260Ethanol: Not compatible with greater than 10% ethanol fuel