A-B1W18815-AI Primer BulbOne New Aftermarket Replacement Primer Bulb Fits Walbro Carburetors Fits Echo, Fits Homelite, Fits Stihl, Shindaiwa, McCulloch and More This aftermarket replacement primer bulb Fits Walbro WA, WT, WY, WYJ, WYK, WYL, WYP, and WZ series carburetors used on a wide range of 2 cycle handheld power equipment including chainsaws, string trimmers, leaf blowers, and brush cutters. The primer bulb draws fuel from the tank into the carburetor to ensure reliable,