For complex repairs like carburettor tuning or internal engine work, it is recommended to visit an authorised STIHL Dealer to ensure warranty compliance and safety. for starting issues or instructions on restringing the trimmer head STIHL FS 38 Petrol Line Trimmer | Home User 27 Oct 2022 —
Clean or replace regularly. A clogged filter reduces engine power and increases fuel consumption. Spark Plug: stihl fs 38 service manual