FS 91 R

Standard

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  STIHL 4-MIX® ENGINE

  FOR FANTASTIC ENGINE POWER WITH LOW MAINTENANCE. The STIHL 4-MIX® engine is a four-stroke engine that does not require any oil circuit components, thanks to refuelling with an oil and gasoline mix. That’s why it’s more compact, more lightweight, and requires less maintenance than conventional four-stroke engines, while at the same time being powerful and offering a comfortable sound pattern. STIHL 4-MIX® engines comply with the European Stage V emissions directive.
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  STIHL ANTI-VIBRATION SYSTEM

  Intense vibration at the handles of power tools can lead to longer-term effects of blood vessels in the hands and arms. STIHL have therefore developed an effective anti-vibration system where by the oscillations from the machines engine are dampened which significantly reduces vibrations at the handles.
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  STOP BUTTON

  RESTART WORK QUICKLY. With the stop button, you can switch off your power tool quickly and easily for a short break, for example. As the button springs back to its original position after actuation, the engine is immediately ready to start again. This provides more comfort after breaks and increases your work efficiency.
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  AUTOMATIC DECOMPRESSION

  EFFORTLESS STARTING. Automatic decompression makes it easier to start the engine. This is because the system automatically opens the intake valve when the engine is started; the opening time of the valve is extended, and as a result the compression pressure is reduced. This significantly reduces the force required on the starter cord.
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  LONG AIR FILTER SERVICE LIFE

  ENSURES LONG CHANGEOVER INTERVALS. Thanks to its long service life, you rarely need to change the easily accessible filter. This saves resources and reduces maintenance effort.
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  MANUAL FUEL PUMP

  A small fuel pump delivers fuel to the carburettor at the touch of a button. This reduces the number of starting strokes required from a cold start.