FitBest Carburetor with 2 Primer Bulbs for Walbro # WT-973 Fits Troy-bilt TB21EC TB22EC TB32EC TB42BC TB80EC New quality replacement carburetor Replaces MPN: 753-06170, WT-973 Fits Cub Cadet, Troy Bilt, Craftsman, Yardman, Ryobi, MTD, Weedeater trimmers Package includes: 1 x carburetor, 2 x primer bulbs