Instruction Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2020 0458-207-8621-C. VA9.K20. 0000000367_027_GB
MS 170, MS 170 C, MS 180, MS 180 C
English
1
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 chain saw.
To receive maximum performance and
satisfaction from your STIHL chain saw,
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 chain saw. 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 chain saw is a high-speed
wood-cutting tool, some special safety
precautions must be observed as with
any other power saw to reduce the risk
of personal injury. Careless or improper
use may cause serious or even fatal
injury.
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 3
Cutting Attachment 26
Mounting the Bar and Chain (front
chain tensioner) 27
Mounting the Bar and Chain (quick
chain tensioner) 28
Mounting the Bar and Chain (side
chain tensioner) 30
Tensioning the Saw Chain (front
chain tensioner) 31
Tensioning the Saw Chain (quick
chain tensioner) 31
Tensioning the Saw Chain (side
chain tensioner) 31
Checking Chain Tension 32
Fuel 32
Fueling 33
Chain Lubricant 35
Filling Chain Oil Tank 36
Checking Chain Lubrication 36
Chain Brake 37
Starting / Stopping the Engine 38
Operating Instructions 41
Taking Care of the Guide Bar 42
Shroud 43
Cleaning the Air Filter 43
Engine Management 43
Adjusting the Carburetor 44
Spark Arresting Screen in Muffler 44
Spark Plug 45
Storing the Machine 46
Checking and Replacing the Chain
Sprocket 46
Maintaining and Sharpening the
Saw Chain 47
Maintenance and Care 51
Main Parts 53
Specifications 55
Ordering Spare Parts 56
Maintenance and Repairs 56
Disposal 57
Limited Warranty 57
STIHL Incorporated Federal
Emission Control Warranty
Statement 57
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 59
Trademarks 61