AISEN Carburetor with Primer Bulb Diaphragm Gakset Rebuild Kit for MTD Bolens Troy-Bilt Craftsman Trimmer # WT-973 753-06190 Fits Troy-bilt TB21EC TB22EC TB32EC TB42BC TB80EC Replacement manufacturer part no. 753-06170, WT-973 For MTD Bolens Troy-Bilt Yard Man Craftsman trimmer, not limited Package include: 1 x carburetor, 2 primer bulb, 2 gasket,1set repair kit