FS 40 Petrol Grass Trimmer
FS 40 Petrol Grass Trimmer

FS 40 Petrol Grass Trimmer

2-stroke Petrol Engine
Regular price
Sale price
20% VAT included
If you don't already own a compatible battery & charger, please choose a different option above.

This item may be available at your local STIHL Approved Dealer

The FS 40 is a reliable and easy to use petrol grass trimmer that is perfect for trimming lawn edges and small areas of grass in your garden.

It has a simplified starting system to make it easy to start at all times - just set the choke, pump the fuel primer and pull the starter cord and you'll be ready to start trimming.

It also features a multi-function control handle, so it's easy to operate using just your thumb. The efficient STIHL 2-MIX engine deliver more power with less fuel consumption compared to a standard 2-stroke engine.

It comes as standard with the AutoCut C 6-2 mowing head which uses nylon mowing line to trim the grass, but you can also fit the PolyCut 6-2 mowing head with polymer blades or a DuroCut 5-2 head which uses serrated line pieces, to mow thicker, tougher grass.

The FS 40 is an easy to use grass trimmer that helps you get the job done quickly.


2-MIX engine technology 2-MIX engine technology

STIHL's 2-MIX engine is designed to be powerful and economical, increasing power output whilst also reducing fuel consumption.

Multi-function control handle Multi-function control handle

The multi-function control handle means the FS 40 is easy to operate using just your thumb so you can use the tool securely and comfortably.

Electronic ignition module Simplified starting system

Simply set the choke, pump the fuel primer, pull the starter cord and you are ready to start trimming! The FS 40 can be switched off after a brief press of the stop button. Once the machine is at a standstill, the ignition activates again automatically so the ignition is always ready to be started.

Manual fuel pump Manual fuel pump

The manual fuel pump delivers fuel to the carburettor at the touch of a button so it's easier to start even after longer breaks in use.


QWhat type of cutting attachment does this use?

A: The FS 40 uses an AutoCut C 6-2 mowing head, with 2.0mm mowing line.

QCan I use other cutting attachments with this tool?

A: You can swap the AutoCut C 6-2 for a PolyCut 6-2 which uses polymer blades or a DuroCut 5-2, which uses serrated line pieces. You can't use metal cutting tools with this grass trimmer.

QWhat should I wear when using this grass trimmer?

A: We recommend that you wear snug-fitting clothes, goggles, a face shield, gloves, ear defenders and sturdy boots or shoes, and tie back long hair.


#1Storing your FS 40

Store your FS 40 in a clean and dry area and keep out of the reach of children at all times. Don't leave your machine with unused fuel in it for long periods of time.

#2Make the most of your mowing line

To get the most of your mowing line, simply pop it in a bucket of water for 12-24 hours before using it to make it more flexible and less likely to break. .

#3Check for wildlife

Don’t forget to check your work area for wildlife before starting to use your tool. In particular, you should check for nesting birds before trimming hedges, as well as checking for other small animals such as hedgehogs before trimming long grass.

Technical Specifications

Weight kg 1) 4.4
Sound pressure level with standard tool dB(A) 2) 94
Sound power level with standard tool dB(A) 2) 107
Vibration value, left with standard tool m/s2 3) 7
Vibration value, right with standard tool m/s2 3) 6.4
Total length cm 4) 145
Displacement cm³ 27.2
Power output kW/bhp 0.7/1.0
Cutting diameter mm 380
Tank volume l 0.34
Standard cutting tool AutoCut C 6-2

1) Without fuel, cutting tool and without protection
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
5) without cutting tool and deflector

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

STIHL Factory


Andreas Stihl founds an engineering office in Stuttgart and develops his own chainsaw.

STIHL Logo 1928


STIHL becomes a brand. The name represents the ceaseless quest of the engineer and company founder Andreas Stihl to ease the heavy labour of forestry work with his inventions.

STIHL Chainsaw 1930


STIHL presents his portable petrol-powered chainsaw at the Leipzig trade fair – it is well received and orders flow in from across Europe.

Learn more about the history of STIHL

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