Stens OEM Primer Bulb Ethanol: Not compatible with greater than 10% ethanol fuel Color may vary from OEM OD: 7/8 Height: 1 5/16 Walbro WT-23A, WYJ-33, WYJ-34, WYJ-45, WYJ-92, WYJ-94 and WYJ-86 carburetors