Quick Answer

If your cordless lawnmower height adjustment is stiff or not working correctly, it is usually caused by debris build-up or lack of lubrication in the adjustment mechanism. Cleaning and lightly lubricating the lever typically resolves the issue.

Important: Always switch off the mower and remove the battery before carrying out any checks or adjustments.

Before You Start

Before working on the height adjustment system:

  • Switch the lawnmower off
  • Remove the battery
  • Remove the safety key (if fitted)
  • Place the mower on a stable surface

  • Important: Never attempt adjustments while the mower is powered.

    Possible Causes and Basic Checks

    1. Debris build-up

    Check the height adjustment lever area for:

    • Grass clippings
    • Dirt or compacted debris
    • Blockages around moving parts

  • Remove any debris carefully before testing again.

    2. Stiff lever

    If the lever feels difficult to move:

    • Apply a light spray of suitable lubricant (e.g. WD-40)
    • Move the lever back and forth to distribute it evenly

  • Important: Do not over-lubricate the mechanism.

    3. Mechanical connection check

    Inspect the connection between:

    • Height adjustment lever
    • Rear axle
    • Connecting rod

  • Ensure all parts are properly aligned and not disconnected or loose.

    How to Adjust Cutting Height

    Follow these steps:

    Step 1: Pull the lever

    • Pull the cutting height adjustment lever outwards

  • Step 2: Select height

    • Move the lever forwards or backwards
    • Choose the required cutting height

  • Step 3: Lock in position

    • Return the lever to its locked position
    • Ensure it is securely seated

  • Important: The lever must click or lock firmly into place.

    Cutting Height Range

    • Position 1 to 7: typically 25mm to 75mm
    • Some models may vary depending on design

  • Model Variation Note

    • 32cm cordless mowers usually have 5 cutting positions
    • All other sizes typically have 7 cutting positions

  • Important: Always refer to your specific model specifications if unsure.

    If the Issue Persists

    If the height adjustment still does not work correctly:

    • Stop using the mower
    • Contact our Technical Support Team
    • Provide your model number and a description of the issue

  • Further inspection may be required.

    Important Information

    • Keep the adjustment system clean and free of debris
    • Lubricate only when necessary
    • Ensure the lever is fully locked before use
    • Do not force the mechanism if it is stuck

  • Frequently Asked Questions

    Why is my height adjustment lever stiff?

    This is usually caused by grass build-up or lack of lubrication in the mechanism.

    Can I still use the mower if the height adjustment is stuck?

    No. The mower should not be used until the issue is resolved.

    What lubricant should I use?

    A light multi-purpose spray lubricant such as WD-40 is typically suitable.

    Why won’t the lever stay in place?

    This may indicate a misalignment or mechanical issue with the connecting rod or axle system.