1. Please check that the line is correctly wound around the spool.
  2. If you have one, please try the additional spool and line.
  3. Ensure that you are using the correct line for the trimmer (-i.e. diameter of line according to manual specifications: generally, 1.2mm).

If your problem persists and it is not due to any of the above reasons, then please contact our helpline, or email us, and we will advise further.