Instruction Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2015 0458-759-8221-A. VA0.M15. 0000006428_006_GB
MS 661 C-M
English
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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
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
It has been built using modern
production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and troublefree use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
Guide to Using this Manual 2
Safety Precautions 3
Reactive Forces 8
Working Techniques 9
Cutting Attachment 18
Mounting the Bar and Chain 19
Tensioning the Chain 20
Checking Chain Tension 20
Fuel 20
Fueling 21
Chain Lubricant 23
Filling Chain Oil Tank 23
Checking Chain Lubrication 24
Chain Brake 24
Winter Operation 25
Electric Handle Heating 26
Starting / Stopping the Engine 27
Operating Instructions 30
Oil Quantity Control 31
Taking Care of the Guide Bar 32
Remove air filter 32
Cleaning the Air Filter 33
Engine Management 33
M-Tronic 33
Spark Arresting Screen in Muffler 34
Spark Plug 34
Rewind Starter 35
Storing the Machine 35
Checking and Replacing the Chain
Sprocket 36
Maintaining and Sharpening the
Saw Chain 37
Maintenance and Care 41
Main Parts 43
Specifications 45
Ordering Spare Parts 46
Maintenance and Repairs 46
Disposal 47
Important Safety Instructions 47
Key to Symbols 49
STIHL Limited Emission Control
Warranty Statement 50
CSA Standard 52