FS 91 petrol brushcutter: powerful and long-lasting
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.
Mowing Head Type
Mähkopf AutoCut 25-2
Sound pressure level with plastic tool
Sound power level
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
STIHL 4-MIX Engine
You can always rely on STIHL to keep setting new benchmarks this time with 4-stroke mixed lubrication technology. The STIHL 4-MIX engine, which runs on a fuel-oil mix just like a 2-stroke, offers the benefits without the compromises of 4-stroke power. STIHL 4-MIX engine technology provides fast acceleration, more power, added torque, lower noise, reduced emissions and increased fuel efficiency to complete jobs quickly, quietly and more easily.
Multi-function control handle
Easy, comfortable thumb-operated control means the operator's hand never leaves the handle.
Ergonomic bike handle
When used in conjunction with a harness, the bike handle enables a smooth mowing action. Ideal for working on large areas and allows the machine to be easily guided, thus reducing fatigue.
STIHL Anti-vibration system
The STIHL anti-vibration system is available in a one-point version for smaller models and in an especially effective four-point version for larger machines starting with the STIHL. It reduces handle vibration for easy and comfortable operation.
Bike handle adjustment
The central clamp enables the ergonomic bike handle to be easily adjusted without tools to suit the height of the user. The handle can be rotated by 90°, making it more compact for transport and storage.
You do not need to control the stop button when restarting. The engine can be started at any time.
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.
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.
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 compounds). 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.
Fully synthetic oil with exceptional lubrication properties. Burns with extremely low residue due to ash-free additive. Suitable for continuous use under the most demanding engine conditions. Performance class: JASO-FB, ISO-L-EGB. Fuel/oil ratio 1:50.
Robust brushcutter and work trousers with breathable impact protection, long ventilation openings on the rear and loops for FS braces. Registered as a patent, the FS leg protection for extreme work conditions can be inserted inside the leg pockets. Several practical pockets.
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.
Brushcutter and work trousers accessory with a triple function: impact protection, thorn and water resistance. Good breathable properties. Robust outer fabric in vintage look, high cotton content and 18% durable stretch. Ventilation zips on the back of the thighs. Two hip pockets with zip, back pocket and tape measure pocket on the right. Thigh pocket with integrated mobile phone pocket on the left. Knee protectors and leg protection (both optional) for special jobs.
Protect yourself from cold and wind when working with this warm, flexible and lightweight jacket. Highly breathable and quick-drying with waterproof hi vis orange panels and water repellant dark panels.Highly elastic, fast drying and warming. Functional zones: Black areas are water-repellent and breathable, coloured zones are waterproof and breathable, chest and inside pocket and abrasion protection on the shoulders.
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.
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 round. Ear protect: EN 352, EN 397, EN 1731.
*Prices are valid from the 20/06/2022 to 01/09/2022. 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.