Troy Bilt TB22EC, TB20CS Trimmer Bump Head Knob Assembly
Replace a broken or lost bump knob on your Troy Bilt trimmer with this genuine MTD replacement. The knob secures the line spool and allows line to advance. Fits in many brands and models of handheld trimmers, string trimmers, and gas trimmers, including TB22EC and TB20CS. Please use part numbers to confirm that this trimmer knob will work with your Troy Bilt trimmer.
Troy Bilt Models:
MTD Part Numbers: 791-153066B, 791-153066, 791-147153