Walbro Primer Bulb #1 Best Seller in Primer Bulbs OEM WALBRO PRIMER BULB Specifications: - 3/4" OD x 9/16" HT - For Walbro WA, WT, WY, WJJ, WYJ, WKK, WYK, WYL, WYP and WZ and other carburetors that require a 3/4" OD x 9/16" HT primer bulb. REPLACES: ECHO/SHINDAIWA,,, EFCO 2318572
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