Overview

Excessive vibration in your 108V cordless lawnmower is usually caused by an unbalanced, loose, or damaged blade. This can happen if the blade has struck an obstacle such as stones, roots, or hard debris in the garden, or if the blade or adapter components have become worn or corroded.

In some cases, rust, bending, or damage to the blade mounting lugs can also affect balance and lead to vibration during operation. If the blade is damaged, it must be replaced before further use.

Step-by-Step Guide

Step 1: Switch Off and Secure the Mower

  • Turn the mower off completely.
  • Remove the battery and safety key (if fitted).
  • Ensure the mower cannot be started accidentally.

  • Step 2: Inspect the Blade

    • Carefully check the blade for:
      • Cracks or bends
      • Rust or heavy wear
      • Damage from impact with objects
    • Check the blade adapter lugs for signs of shearing or damage.

  • ⚠️ If any damage is found, the blade must be replaced.

    Step 3: Remove a Stuck or Tight Blade (If Required)

    If the blade is damaged and difficult to remove:

    Step 1: Secure the Blade

    • Use a strong wooden block or similar object.
    • Wedge it firmly to prevent the blade from moving.

  • Step 2: Loosen the Blade Bolt

    • Use a socket wrench on the blade fixing bolt.
    • Turn the bolt anti-clockwise.
    • Apply firm initial force, then continue loosening gradually.

  • Step 3: Remove the Blade

    • Once the bolt is removed, carefully take off the blade.
    • Inspect the mounting area for damage or debris.

  • Step 4: Install the New Blade

    • Position the new blade onto the blade adapter correctly.
    • Ensure it is seated properly and aligned.
    • Refit the blade bolt.
    • Tighten securely using the socket wrench.

  • Step 5: Final Safety Check

    • Confirm the blade is firmly fixed and does not move.
    • Ensure no tools or debris remain in the mower.
    • Reinsert the battery and safety key before testing.