One Primer Bulb Fits Walbro Carberutors Fits Poulan Equipment WT-587-1 WT-592-1New Aftermarket Replacement Primer Bulb Fits Walbro Carberutor Models (Fits Poulan Equipment) WT 587 1, WT 592 1, WT 606 1, WT 626 1 Tech Information: **Fits Walbro WA and WT Carburetors Fits Poulan Equipment** Fits Walbro Models: WT 501 1, WT 519 1, WT 557 1, WT 558 1, WT 586 1, WT 630 1, WT 631 1, WT 632 1, WT 638 1 WA 224 1, WA 226 1, WA 228 1, WA 229 1, WA 230 1, WA 232 1 Replaces Part Numbers: (Fits Walbro) 188 16 1, 188 508, 188161, 188508