Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2011
0458-254-8621-C. M11.H11.CP. 
0000000384_007_GB
FS 110, FS 110 R
English
1
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Contents
Allow only persons who fully understand 
this manual to operate your trimmer / 
brushcutter.
To receive maximum performance and 
satisfaction from your STIHL trimmer / 
brushcutter, it is important that you read, 
understand and follow the safety 
precautions and the operating and 
maintenance instructions in chapter 
"Safety Precautions and Working 
Techniques" before using your trimmer / 
brushcutter. For further information you 
can go to www.stihlusa.com.
Contact your STIHL dealer or the STIHL 
distributor for your area if you do not 
understand any of the instructions in this 
manual.
Make sure your unit is equipped with the 
proper deflector, handle and harness for 
the type of cutting attachment being 
used. Always wear proper eye 
protection.
Guide to Using this Manual 2
Safety Precautions and Working 
Techniques 3
Approved Combinations of Cutting 
Attachment, Deflector, Handle and 
Harness 18
Approved Power Tool Attachments 20
Mounting the Bike Handle 20
Mounting the Loop Handle 22
Adjusting the Throttle Cable 24
Fitting the Carrying Ring 24
Mounting the Deflector 24
Mounting the Cutting Attachment 25
4-MIX Engine 28
Fuel 29
Fueling 30
Fitting the Harness 31
Balancing the Trimmer/Brushcutter 32
Starting / Stopping the Engine 33
Operating Instructions 36
Cleaning the Air Filter 36
Engine Management 36
Adjusting the Carburetor 37
Spark Arresting Screen in Muffler 38
Spark Plug 39
Lubricating the Gearbox 40
Replacing the Starter Rope and 
Rewind Spring 40
Storing the Machine 42
Sharpening Metal Cutting Blades 43
Maintenance and Care 44
Main Parts 46
Specifications 48
Special Accessories 49
Maintenance and Repairs 49
STIHL Incorporated Federal 
Emission Control Warranty 
Statement 50
STIHL Incorporated California 
Exhaust and Evaporative 
Emissions Control Warranty 
Statement 52
Trademarks 54
Warning!
Because a trimmer / brushcutter is a 
high-speed cutting tool some special 
safety precautions must be observed to 
reduce the risk of personal injury. Care-
less or improper use may cause serious 
or even fatal injury.