The Stihl FS 91 petrol brushcutter is best suited for working on large areas of tough grass. The simplified starting, bike handle and control handle with stop button make this a dream to use. The 4-MIX® engine with larger tank for increased cutting time between filling has a rigid drive shaft.
Supplied with ADVANCE Universal double shoulder harness, metal grass blade and AutoCut mowing head.
STIHL 4-MIX® engine
You can always rely on STIHL to keep setting new benchmarks this time with 4-stroke mixed lubrication technology. unlike a 2-stroke, offers the benefits without the compromises of 4-stroke power. The STIHL 4-MIX® engine technology provides fast acceleration, more power, added torque, lower noise, reduced emissions and increased fuel efficiency.
Air filter with long service life
The easily accessible paper filter with a long service life means it can go for long intervals without needing to be changed.
Manual fuel pump (Purger)
A small fuel pump delivers fuel to the carburettor at the touch of a button. This reduces the number of starting strokes required following extended breaks in operations.
When used in conjunction with a harness, the bike handle enables a smooth mowing action. The bike handle allows the machine to be easily guided, making it ideal for working on large areas and thus reducing fatigue.
Intense vibration at the handles of power tools can lead to long-term effects on blood vessels in the hands and arms. STIHL has therefore developed an effective anti-vibration system whereby the oscillations from the machine’s engine are dampened which significantly reduces vibrations at the handles.
All the engine and speed controls are easily accessible and at your finger tips.
Tool-free handle adjustment
The handle bar can be easily adjusted to suit the users working position via the tool-free handle adjustment clamp.
ADVANCE Universal Harness
Soft padding makes work more comfortable during longer jobs.
The multi-function control handle features a stop switch which automatically reverts back to the start position for a quicker, simple restart.
|Standard cutting tool
||AutoCut mowing head C 25-2. GSB 230-2
|Power output hp
|Weight kg 1)
|Sound pressure level with metal tool dB(A) 2)
|Sound pressure level with plastic tool dB(A) 2)
|Sound power level with metal tool dB(A) 2)
|Sound power level dB(A) 2)
|Vibration value, right with plastic tool m/s2 3)
|Vibration value, left with plastic tool m/s2 3)
|Vibration value, left with metal tool m/s2 3)
|Vibration value, right with metal tool m/s2 3)
|Total length cm 4)
|Cutting diameter mm
|Tank volume l