Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2015
0458-546-8621-D. VA2.M14.
0000001050_017_GB
FS 40, FS 40 C, FS 50, FS 50 C
English
1
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This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
Allow only persons who fully understand
this manual to operate your trimmer.
To receive maximum performance and
satisfaction from your STIHL trimmer, 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. 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.
WARNING
Because a trimmer is a high-speed
cutting tool some special safety
precautions must be observed to reduce
the risk of personal injury. Careless or
improper use may cause serious or even
fatal injury.
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 14
Mounting the Loop Handle 15
Mounting the Deflector 15
Mounting the Cutting Attachment 16
Fuel 19
Fueling 20
Starting / Stopping the Engine 22
Operating Instructions 24
Cleaning the Air Filter 25
Engine Management 25
Adjusting the Carburetor 26
Spark Plug 26
Engine Running Behavior 27
Rewind Starter 27
Storing the Machine 28
Maintaining the Mowing Head 28
Inspections and Maintenance by
Dealer 32
Maintenance and Care 33
Main Parts 35
Specifications 36
Maintenance and Repairs 37
Disposal 38
STIHL Incorporated Federal
Emission Control Warranty
Statement 38
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 40
Trademarks 42
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