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Stihl FS 91R Petrol Brushcutter/Strimmer (28.4cc) 4-Mix

(2 customer reviews)

£498.36 (inc VAT)

In stock

SKU: 18-41802000686

The Stihl FS 91 R petrol brushcutter features a simplied starting system a loop handle aand a control handle with intergrated stop button. The 4-MIX® engine with larger tank for increased cutting time between filling and the rigid drive shaft make it ideal for tougher areas of grass. Comes supplied with single strap shoulder harness and 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. 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.

Decompression system
The decompression valve allows some of the compression pressure in the cylinder to escape, so less force on the starter rope is needed.

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.

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.

Anti-vibration system
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.

Stop switch
The multi-function control handle features a stop switch which automatically reverts back to the start position for a quicker, simple restart.

Loop handle
The brushcutter loop handle is ideal when working in confined spaces and mowing around obstacles.

Technical Information

Displacement cm3 28.4
Weight kg 1) 5.5
Power output hp 1.3
Sound power level dB(A) 2) 106
Vibration value, left with plastic tool m/s2 3) 5.3
Vibration value, right with metal tool m/s2 3) 4.3
Performance kW 0.95
Total length cm 4) 180
Cutting diameter mm 420
Vibration value, right with plastic tool m/s2 3) 5.3
Sound pressure level with plastic tool dB(A) 2) 95
Sound pressure level with metal tool dB(A) 2) 93
Sound power level with metal tool dB(A) 2) 105
Vibration value, left with metal tool m/s2 3) 3.8
Tank volume l 0.71
Standard cutting tool AutoCut mowing head C 25-2

Parts, Consumables + Accessories for this unit

Cutting Tool(s):

Service Kit:

Engine Oil (Good, Better, Best):


Cleaning + Care:

PPE (Stihl Function range for occasional/home use):


Power Type


2 reviews for Stihl FS 91R Petrol Brushcutter/Strimmer (28.4cc) 4-Mix

  1. Dave (verified owner)

    Bought the Stihl FS91R in the ring version as my other two Stihls FS90 & FS70 are cowhorn type. Same excellent build quality but with nice improvements on my FS90 like the resetting on/ off switch, bigger fuel tank, better air filter and easy spark plug access. Pity the blade mounting nut and rider plate are not included as the deflector guard included is the type that can be used for both mowing head and brushcutter blade.
    Great price and service from Radmore & Tucker.

  2. kevin (verified owner)

    i brought the FS91R as i needed another quality strimmer and this is everything i have come to expect from Stihl but just better than the older model.
    I use these every day and went tasked with getting me one for the next day Radmore & Tucker came up with the goods once again. Many thanks to everyone there

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