AISEN Carburetor with Primer Bulb Diaphragm Gakset Rebuild Kit for WT-973 Troy-Bilt TB80EC YM21CS TB21EC TB22EC TB32EC TB42BC TB80EC TB2040XP Trimmer Replacement manufacturer part no. 753-06170, WT-973 For MTD Bolens Troy-Bilt Yard Man Craftsman trimmer Package include: 1 x carburetor, 2 x primer bulb,2gasket,1repair kit