FS 91
FS 91 petrol brushcutter: powerful and long-lasting
General
For working on large areas of tough grass. A simplified start-up sequence for convenient starting, bike handle, control handle with stop button, 4-MIX® engine with larger tank for longer use and rigid drive shaft.
Versions
Price-
Petrol Brushcutter - FS 91 - AutoCut 26-2$699.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time 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.
Product variations
- FS 91 R For working in confined spaces, thanks to loop handle
Technical data

Technical data
Technical data | Value |
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Displacement cm³ | 28.4 |
Power output kW | 0.95 |
Weight kg 1) | 5.8 |
Sound pressure level dB(A) 2) | 96 |
Sound power level dB(A) 2) | 107 |
Total length cm 3) | 1.800 |
Fuel tank capacity ml | 710 |
1) Weight excluding fuel, cutting tool and guard
2) K-factor according to DIR 2006/42/EC = 2.5 dB (A)
3) 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.
Standard tools

Standard tools
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Grass Cutting Blade (2 F)
Two-teeth grass cutting blade has a robust high mowing capacity. High capacity in cutting sparse growth as well as hard and dry grass, fern, stinging nettles and reed.
Versions
Price- GrassCut - 230-2 / ID 25.4MM $31.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Grass Cutting Blade (2 F)
Two-teeth grass cutting blade has a robust high mowing capacity. High capacity in cutting sparse growth as well as hard and dry grass, fern, stinging nettles and reed.
Versions
Price- GrassCut - 260-2 / ID 25.4MM $50.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Grass Cutting Blade (4 F)
The cutting blade with four teeth is robust, for large areas, has a high cutting capacity in dense growth, such as grass and weeds.
Versions
Price- GrassCut - 230-4 / ID 25.4MM $19.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Grass Cutting Blade (8 Z)
The cutting blade with eight teeth is robust and suitable for clearing growth with low cutting resistance. High capacity in cutting sparse growth as well as hard and dry grass, fern, stinging nettles and reed.
Versions
Price- GrassCut - 230-8 / ID 25.4MM $24.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time 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.
Accessories

Accessories
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MotoMix
Available at participating stores. Ready-mixed fuel (50:1) for all STIHL engines, optimal performance, best cold start ability, maximum acceleration over the entire RPM range, best running characteristics even with a sudden gas change. Mixed with STIHL HP ultra premium oil for exceptional engine lubrication and extreme cleanliness, fully synthetic and biodegradable for optimal performance and long service life. User- and engine-friendly thanks to fewer emissions (free from ethanol; almost no olefins and aromatic compoands). Can be kept in storage for at least two years. Reliable top performance – STIHL engines and STIHL MotoMix are made for each other, all imaginable uses have been put through rigorous tests.
Versions
Price- MotoMix - 1L - Tin $14.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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HP Ultra 2-Stroke Engine Oil
Fully synthetic oil with exceptional lubrication properties. Burns with extremely low residue due to ash-free additive. Suitable for continuous use ander the most demanding engine conditions. Performance class: JASO-FB, ISO-L-EGB. Fuel/oil ratio 1:50.
Versions
Price- Oil - 2 Stroke - HP Ultra - 1L $39.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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FS PROTECT Hi-Vis Trousers
Robust brushcutter and work trousers in high visibility orange for working on train tracks and streets. Robust outer fabric. With breathable impact protection, reflective strips and long ventilation openings at the rear. Registered as a patent, the FS leg protection for extreme work conditions can be inserted inside the leg pockets. With loops for FS braces. EN 471, protection class 2.
Versions
Price- Work Pants - FS Protect - Hi Vis Orange - M $194.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Knee Protectors
Black, 100% polyethylene, for insertion in kneepad pockets, compatible with knee pockets of all standard trousers.
Versions
Price- Work Pants Inserts - Knee Protection - FS3 & HS $23.90*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Leg Protectors
Suitable for MultiProtect & TriProtect trousers, 65% polyester, 35% cotton, 50cm in length, additional patented and breathable impact protection for extreme jobs.
Versions
Price- Work Pants Inserts - Leg Protection - FS $41.40*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Leather Tool Belt (Black)
Extremely robust, approx. 3 mm thick leather. Double prong buckle. Length 125 cm. Width 4 cm.
Versions
Price- Work Belt - Leather - Black $41.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Braces FS Protect Pants
For all clearing saw and hedge trimmer trousers. Elasticated braces with elasticated velcro, prevents chafing from the harness. Suitable for all sizes.
Versions
Price- Braces - FS Protect Pants $56.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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Professional Helmet Kit
Designed for use with chainsaws. Features include: Helmet with easy ratchet adjustment. Steel Mesh Multi Fit visor with smooth cam-action movement. ComfortMAX High Noise Pro (High Noise) earmuffs: 30 db(A). Lambwool headband. Kit is compatible with all STIHL Multi Fit visors.
Versions
Price- Helmet - Professional - Kit $148.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice. -
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ADVANCE X-Vent Helmet
Low weight helmet set with optimized balance. Ear caps in slim design. Easy head size adjustment by ratched wheel even whilst wearing. Ventilation wholes spread over the entire shell. Metal visor: Spring steel mesh, very high light penetration. Light transmittance: 75-80%. Elastic visor sealing nlong the helmet against dirt and rain. Reflective Stickers all roand. Ear protect: EN 352, EN 397, EN 1731.
Technical data Value Ear protection 109 dBA Weight 830 g Helmet material ABS Inner fittings 6-points Transparency 75 –80 % Versions
Price- ADVANCE X-Vent Helmet $169.00*
*Prices are valid from the 15/11/2023 to 24/12/2023.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time 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.
Documents
Owners manuals and safety brochures
Languages | Date | Link |
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28/11/2023 |