Overview
About the Stihl FS 38
The Stihl FS 38 is a common residential line trimmer. It usually needs service attention when it becomes hard to start, will not idle, has poor throttle response or has a worn trimmer head. Fresh two-stroke fuel, clean filters and good fuel lines are key to keeping it reliable.
Maintenance
Suggested Maintenance Schedule
Every use
Check line head, guard and fuel freshness.
Every 3 months
Clean filter and inspect fuel lines.
Every 6–12 months
Full trimmer service with plug, filter and carburettor check.
Before storage
Drain old fuel or run fresh mix before storage.
Use this as general guidance only. Always follow the manufacturer’s owner manual for exact service requirements, oil type, fuel mix and safety instructions.