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 greater battery life, rigid drive shaft, double shoulder harness.
Versions
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FS 91
Deviations from the product range and information provided here are possible, depending on the country. STIHL reserves the right to make changes to technical specifications and equipment.
Technical specifications

Technical specifications
Technical specifications | Value |
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Displacement | 28,4 cm³ |
Power output | 0,95/1,3 kW/bhp |
Weight 1) | 5,8 kg |
Sound pressure level 2) | 96 dB(A) |
Sound power level 2) | 107 dB(A) |
Vibration level, left/right with plastic tool 3) | 5,5/4,5 m/s² |
Cutting tool | Grass cutting blade 230-2 |
Total length 4) | 180 cm |
1) Weight excluding fuel, cutting tool and guard
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
Deviations from the product range and information provided here are possible, depending on the country. STIHL reserves the right to make changes to technical specifications and equipment.
Features

Standard equipment
Deviations from the product range and information provided here are possible, depending on the country. STIHL reserves the right to make changes to technical specifications and equipment.
Cutting Tools

Cutting Tools
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GrassCut Grass cutting blade (8 teeth)
Made of steel with 8 teeth for mowing thick, dry grass and reeds.
Versions
- Grass cutting blade 230 mm (8 teeth)
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GrassCut 250-32, low spin
Flying stones and gravel often create problems when mowing with clearing saws on traffic islands or in public parks and green spaces. STIHL has the answer: the low-spin 250-32 grass-cutting blade with KWF certificate reduces the safety distance from objects and vehicles to three metres. Thanks to the special tooth shape, the risk of particles flying around is reduced to a minimum. The result is greater safety, maximum working comfort and quicker results. Article 4001 713 3813 for FS 80 , FS 85 , FS 89 , FS 91 , FS 111 , FS 131 , FSA 130, FSA 135, FSA 130 R, FSA 135 R, FS 94 RC-E , FS 94 C-E , FSA 90 R, FSA 90, FS 240 C-E, FR 131 T, FR 480 , FR 480 C-F, FR 410 C-E , FR 460 TC-EM. Article 4001 713 3812 for FS 260 C-E, FS 311, FS 360 C-EM , FS 410 C-EM ,FS 410 C-EM L, FS 410 C-EM K , FS 460 C-EM K , FS 490 C-EM K , FS 490 C-EM K, FS 460 C-EM , FS 460 C-EM L , FS 490 C-EM , FS 490 C-EM L, FS 510 C-EM, FS 560 C-EM.
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GrassCut Grass cutting blade 250-44
Low-throw, steel grass-cutting blade with 44 teeth (diameter: 250 mm). Clippings are not scattered, and the risk of stones flying up as debris is low. Ideal for mowing tough, dry grass and stubborn weeds. Suitable for reeds and bushes. Use only with the universal guard.
Versions
- Grass cutting blade 250-44
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DuroCut mowing head 20-2
Double lines, for mowing and thinning work. Up to four lines can be easily inserted. Compatible with many different sizes and types of mowing line.
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DuroCut mowing head 20-2
Double lines, for mowing and thinning work. Up to four lines can be easily inserted. Compatible with many different sizes and types of mowing line.
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Versions
- Grass cutting blade 250-40 Special
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GrassCut Grass cutting blade 250-44
Low-throw, steel grass-cutting blade with 44 teeth (diameter: 250 mm). Clippings are not scattered, and the risk of stones flying up as debris is low. Ideal for mowing tough, dry grass and stubborn weeds. Suitable for reeds and bushes. Use only with the universal guard.
Versions
- Grass cutting blade 250-44
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Deviations from the product range and information provided here are possible, depending on the country. STIHL reserves the right to make changes to technical specifications and equipment.
Accessories

Accessories
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ADVANCE universal harness, fluorescent orange
High visibility. Perfectly complements protective clothing when mowing in hazardous areas, with a comfort carry ring for quickly attaching and removing the clearing saw, for FS 50 – FS 560 and FSA 90.
Versions
- ADVANCE universal harness, fluorescent orange
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Upgrade Kit GrassCut 250-32
For converting clearing saws that have a nylon mowing head to the GrassCut 250-32 low-spin grass-cutting blade, including all attachments and transport guard. Consists of: 1 × GrassCut 250-32 1 × metal tool transport guard 1 × rider plate 1 × thrust washer 1 × collar nut For FSA 130, FSA 135, FS 89, FS 91, FS 94, FS 111, FS 131, FS 240, FR 131 T, FR 410, FR 460 and FR-KM.
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Stop kit for circular saw blades
Stop kit and protection for circular saw blades. For accurate cutting with a circular saw blade.
Versions
- Stop kit for circular saw blades, Ø 200 mm
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FH 145° scrub cutter
For cutting close to the ground and for low-spin mowing in very narrow spaces. Flexible adjustment mechanism, space-saving carrying position. Weight: 1.5 kg. Fits FS 90, FS 91, FS 100, FS 111, FS 130 and FS 131.
Versions
- FH 145° scrub cutter
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STIHL Smart Connector
The STIHL Smart Connector forms the basis for using all STIHL connected functions. These functions can be used via both the STIHL connected App and the STIHL connect Portal. Once correctly attached to a STIHL power tool or another manufacturer’s power tool, the STIHL Smart Connector records operational hours while the machine is running, stores them and transmits them to your smartphone via Bluetooth as soon as it is within range. The data received in the STIHL connected App is transferred to the STIHL Cloud when there is an internet connection. The data is stored there in compliance with data protection regulations. The STIHL connected App and STIHL connected Portal allow you to access your power tool data at any time. STIHL connected opens up new avenues for professional users to obtain a convenient and transparent overview of their own power tool fleet. At the same time, STIHL connected provides information including operational hours, power tool status including reminders of overdue maintenance, the last known location, and whether or not the power tools are currently nearby. For professional users, this means improved digital fleet management, more efficient processes within companies, and even closer contact with STIHL dealers. Private users can also use the system to keep an eye on their power tools and carry out maintenance at the right time.
Technical specifications Value Dimensions (l x b x h) 53 x 42 x 14 mm Signal range ca. 10 m Running time per battery charge ca. 1 Year Connectivity BLE 4,2 Battery 3V CR 2.032 Weight 20 g -
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Versions
- Hip pad
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ADVANCE X-TREEm forestry harness
Offering outstanding ergonomic design, specially developed for long periods of forestry work using circular saws. Highly comfortable to wear due to the length-adjustable back section and infinitely variable load distribution between the shoulders and hips, for FS 89 – FS 560, and FSA 90.
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Rotary scissors RG
Tool attachment for brushcutters. For effective removal of weds and grass from various surfaces such as gravel and paved areas. Enables low-spin mowing, for example along roads and around traffic islands. Complete functionality in the attachment gearbox. Powerful cut, tends not to become blocked with cuttings, easy and quick blade change. Fits: FS 91, FS 94, FS 111, FS 131, FSA 130.
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Deviations from the product range and information provided here are possible, depending on the country. STIHL reserves the right to make changes to technical specifications and equipment.
Documents
Owners manuals and safety brochures
Languages | Date | Link |
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26.04.2023 |