Stihl FS 91
Petrol brushcutter for landscape maintenance with 4-MIX engine and bike handle
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.
Technical data Value 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
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.
Air filter with long service life
The easily accessible paper filter with a long service life means it can go for long intervals without changing. (similar to illustration)
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.