FC 91 - Hedge Trimmer STIHL - Free user manual and instructions
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| Product Type | Hedge Trimmer |
| Brand | STIHL |
| Model | FC 91 |
| Engine Type | Two-stroke, air-cooled |
| Displacement | 22.7 cm³ |
| Power Output | 0.7 kW |
| Blade Length | 60 cm (24 in) |
| Weight | 4.6 kg |
| Fuel Mixture | 50:1 (gasoline:2-stroke oil) |
| Fuel Tank Capacity | 0.33 L |
| Ignition System | Electronic |
| Carburetor | Membrane |
| Handle | Loop handle with vibration reduction |
| Sound Pressure Level | 94 dB(A) |
| Vibration Level (Left/Right) | 2.5 m/s² / 2.5 m/s² |
| Safety Features | Double trigger, hand guard |
| Maintenance | Clean air filter, sharpen blades, check spark plug |
| Spare Parts Availability | Available from STIHL dealers |
Frequently Asked Questions - FC 91 STIHL
What fuel mixture does the STIHL FC 91 require?
The STIHL FC 91 requires a 50:1 mixture of unleaded gasoline and STIHL two-stroke oil.
How do I start the FC 91 hedge trimmer?
Set the master control lever to the start position, pull the choke, and pull the starter rope firmly. Once engine fires, push the choke back and continue pulling until it runs smoothly.
What is the blade length of the FC 91?
The FC 91 has a blade length of 60 cm (24 inches), suitable for medium-to-large hedges.
How often should I sharpen the blades?
Sharpen the blades when they become dull, typically after 10-20 hours of use, or if you notice torn leaves instead of clean cuts.
What kind of oil should I use for the engine?
Use only STIHL two-stroke engine oil or a high-quality equivalent designed for air-cooled engines.
How do I clean the air filter?
Unscrew the air filter cover, remove the felt and foam elements, wash them in warm soapy water, let dry, and reinstall. Replace if damaged.
What is the weight of the FC 91?
The STIHL FC 91 weighs approximately 4.6 kg (10.1 lbs), making it manageable for extended use.
Can I use the FC 91 for pruning branches?
The FC 91 is designed for trimming hedges and soft brush. It is not recommended for cutting thick branches over 10 mm diameter.
How do I adjust the carburetor?
Carburetor adjustment should be done by a qualified technician. Incorrect adjustment can damage the engine. Refer to the manual for specific settings.
Where can I find spare parts for the FC 91?
Spare parts are available at authorized STIHL dealers or online through the STIHL parts lookup system.
User questions about FC 91 STIHL
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USER MANUAL FC 91 STIHL
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Product information
Brand : STIHL
Model : FC 91
Category : Hedge Trimmer