FS 91
Petrol brushcutter for landscape maintenance with 4-MIX engine and bike handle
General
For working on large areas of tough grass. Simplified starting, bike handle, control handle with stop button, 4-MIX® engine with larger tank for increased cutting time between filling, rigid drive shaft, Supplied with ADVANCE Universal double shoulder harness, metal grass blade and AutoCut mowing head.
Extend your domestic warranty from 2 to 3 years with the purchase of 5 litres of STIHL MotoMix® fuel and this product. Your STIHL Approved Dealer will register your extended warranty on the STIHL warranty database at point of purchase.
Versions
Price-
FS 91£576.00*
* Manufacturer's recommended retail price updated as of February 2020. The manufacturer's recommended retail prices are subject to change without notice.
The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Technical data

Technical data
Technical data | Value |
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Standard cutting tool | AutoCut mowing head C 25-2, GSB 230-2 |
CO² g/kWh | 877 |
Displacement cm3 | 28.4 |
Weight kg 1) | 5.8 |
Power output hp | 1.3 |
Sound power level dB(A) 2) | 107 |
Sound pressure level with plastic tool dB(A) 2) | 96 |
Sound power level with metal tool dB(A) 2) | 107 |
Vibration value, right with plastic tool m/s2 3) | 4.5 |
Performance kW | 0.95 |
Vibration value, left with metal tool m/s2 3) | 5 |
Tank volume l | 0.71 |
Cutting diameter mm | 420 |
Sound pressure level with metal tool dB(A) 2) | 94 |
Vibration value, left with plastic tool m/s2 3) | 5.5 |
Vibration value, right with metal tool m/s2 3) | 4.3 |
Total length cm 4) | 180 |
1) Without fuel, cutting tool and without protection
2) K-factor according to DIR 2006/42/EC = 2.5 dB (A)
3) K-factor according to DIR 2006/42/EC = 2m / s ²
4) Without cutting tool
The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Features

Standard features
The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Cutting Attachments

Cutting Attachments
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Grass cutting blade (2 blades)
Steel double blade, reversible. For working on areas of tough grass.
230 mm – 2 B – for FS 55 R / FS 55 / FS 56 RC-E / FS 56 C-E / FS 70 RC-E / FS 70 C-E / FS 91 / F S 111 / FS 131 / FSA 130 / FSA 130 R / FS 94 RC-E / FS 94 C-E / FSA 90 R / FSA 90 / FS 240 C-E / FR 131 T / FR 460 TC-EFM
260 mm – 2 B – for FS 91 / F S 111 / FS 131 / FSA 130 / FSA 130 R / FS 94 RC-E / FS 94 C-E / FSA 90 R / FSA 90 / FS 240 C-E / FR 131 T / FR 460 TC-EFM
Versions
Price- 260 mm (2 B) £22.00*
* Manufacturer's recommended retail price updated as of February 2020. The manufacturer's recommended retail prices are subject to change without notice.
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The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Accessories

Accessories
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Chest belt
Chest belt for ADVANCE universal harness and backpack blowers. Ensures the shoulder straps are securely positioned.
Versions
Price- Chest belt ADVANCE £7.20*
* Manufacturer's recommended retail price updated as of February 2020. The manufacturer's recommended retail prices are subject to change without notice.
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The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Documents
Owners manuals and safety brochures
Languages | Date | Link |
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12/02/2020 |