String Trimmer Head Replacement with two Bump Knob for Craftsman Wc2200 Ws205 Ws215

1. Knob Replacement: Choose the Right Feed Knob for Your ModelRemove the existing knobHold the old knob on top of the trimmer head and turn it counterclockwise to unscrew it. Note: Some models use reverse threads, so try turning clockwise first if it won’t budge.Take out the internal spring and spool, and check that they are undamaged.Select the correct knobOrange knob: Designed for Craftsman / MTD / Troy-Bilt platforms (this includes your WC2200 / WS205 / WS215 models). It has a coarser thread pitch that matches these machines.Black knob: For other brands like Ryobi or Homelite; not recommended for your Craftsman trimmer.Install the new knobPlace the spring back onto the spool, then insert the spool into the trimmer head body.Align the threads of the orange knob and turn it clockwise until you hear a "click," ensuring it springs back smoothly when pressed. 2. Shaft Bushing Adaptation: Ensure a Perfect Fit with Your Trimmer ShaftConfirm your shaft type: Your Trimmer model uses a 7/8" square shaft (threadless), and this trimmer head’s inner bore is designed to fit this standard.Pre-installation checkVerify that the inner bore at the bottom of the trimmer head has square notches to align with the output shaft. It should slide directly on.If it feels too loose or tight, check for plastic burrs inside the bore and trim them gently with a knife.Secure the trimmer headSlide the head onto the shaft. Hold the trimmer head steady and turn the trimmer shaft counterclockwise (or turn the trimmer head clockwise) until it is fully tightened.After installation, wiggle the head by hand to confirm there is no play or movement. 3. Key Troubleshooting & Adjustment TipsTest the bump feed: Start the trimmer and tap the head gently on the ground. New line should feed out automatically. If it doesn’t, check: Is the knob fully tightened and does it spring back properly?Is the trimmer line wound too tightly on the spool?Are you using the correct line diameter? (Recommended: 0.065" / 1.65mm; thicker line can jam the mechanism.)Compatibility note: The orange knob + square shaft bushing is the standard configuration for your model, so no extra washers or adapters are needed.Long-term maintenance: After each use, disassemble the knob and clear any grass clippings or debris from inside to prevent jamming. Package Contents: 1 x Trimmer Head 2 x Bump Knob Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.

• Trimmer head with Orange Bump Knob fits for Craftsman Wc2200 Ws205 Ws215. Confirm your shaft type: Your trimmer model uses a 7/8" square shaft (threadless), and this trimmer head’s inner bore is designed to fit this standard.
• Compatibility note: The orange knob + square shaft bushing is the standard configuration for your model, so no extra washers or adapters are needed.
• Pre-installation check Verify that the inner bore at the bottom of the trimmer head has square notches to align with the output shaft. It should slide directly on. If it feels too loose or tight, check for plastic burrs inside the bore and trim them gently with a knife.
• Secure the trimmer head Slide the head onto the shaft. Hold the trimmer head steady and turn the trimmer shaft counterclockwise (or turn the trimmer head clockwise) until it is fully tightened. After installation, wiggle the head by hand to confirm there is no play or movement.
• Package Contents: 1 x Trimmer Head with two Bump Knob.