HIPA Carburetor with Primer Bulb for Troy-Bilt TB80EC TB32EC YM21CS TB21EC TB22EC TB2040XP Trimmer # WT-973 Replacement manufacturer part number: 753-06190, WT-973 For Troy-Bilt TB2040XP TB21EC TB22 TB22EC TB32EC TB42BC TB80EC string trimmer Package include: 1 x carburetor, 2 x primer bulb