FS 111 RX - Grass trimmer STIHL - Free user manual and instructions
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| Product Type | Gasoline-powered grass trimmer |
| Brand | Stihl |
| Model | FS 111 RX |
| Engine Type | 4-MIX engine |
| Displacement | 36.3 cc |
| Power Output | 1.6 kW (2.1 hp) |
| Weight | 5.5 kg (without cutting head and deflector) |
| Fuel Capacity | 0.64 L |
| Cutting Width | 410 mm (with AutoCut 5-2 head) |
| Cutting Head | AutoCut 5-2 (bump feed) |
| Drive Type | Direct drive (no shaft) |
| Handle Type | Loop handle |
| Ignition System | Electronic magneto ignition |
| Fuel Mix Ratio | 50:1 (gasoline:2-stroke oil) |
| Noise Level (LpA) | 94 dB(A) (measured per ISO 22868) |
| Vibration Level (ahv) | 6.2 m/s² (left/right handle, per ISO 22867) |
| Safety Features | Stop switch, throttle trigger lockout, deflector guard |
| Maintenance | Clean air filter after 20 hours; replace spark plug annually; check fuel lines |
| Accessories Included | Trimmer head, shoulder strap, tool kit, owner's manual |
| Repairability | Modular design; many parts replaceable; service by authorized dealers |
Frequently Asked Questions - FS 111 RX STIHL
What fuel mixture does the Stihl FS 111 RX require?
The Stihl FS 111 RX uses a 50:1 mixture of unleaded gasoline and high-quality 2-stroke oil (e.g., Stihl HP Ultra). Do not use pre-mixed fuels with ethanol.
How do I start the FS 111 RX?
Ensure the on/off switch is set to 'I'. Press the fuel primer bulb 5-7 times. Set the choke lever to closed position (for cold start). Pull the starter rope slowly until resistance, then pull vigorously. After engine starts, open choke gradually.
What type of cutting line should I use?
Use a 2.4 mm (0.095 inch) diameter nylon trimmer line. Stihl recommends using their AutoCut 5-2 head with pre-wound spools or bulk line.
How do I advance the line on the AutoCut 5-2 head?
While the engine is running at idle, tap the trimmer head on the ground. The bump feed mechanism releases line automatically. Avoid tapping on hard surfaces.
What is the recommended maintenance schedule?
Clean the air filter after 20 hours of use. Replace the spark plug annually. Check and clean the fuel filter every season. Lubricate the gear head every 25 hours.
Can I use metal blades on the FS 111 RX?
No, the FS 111 RX is designed for line trimming only. Do not fit metal blades or brush knives. Using unauthorized attachments may cause injury and damage.
What safety gear should I wear?
Always wear eye protection, hearing protection, sturdy boots with non-slip soles, long trousers, and gloves. Use the provided shoulder strap to maintain control.
Why does my trimmer hesitate or stall?
Common causes: clogged fuel filter, dirty air filter, incorrect fuel mixture, or stale fuel. Check and clean filters, ensure fresh fuel mix, and adjust idle speed if necessary. Refer to manual for carburetor tuning.
How do I store the FS 111 RX for winter?
Drain all fuel from the tank and run the engine until it stops. Clean the trimmer thoroughly. Remove the spark plug and add a teaspoon of oil into the cylinder, pull the recoil slowly to distribute, then reinstall plug. Store in a dry, frost-free place.
Where can I find replacement parts?
Authorized Stihl dealers carry genuine parts. Common spares include the air filter (part number 0000 120 1800), spark plug (Bosch WSR6F), and trimmer line. Use the Stihl parts lookup online with your model number.
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