Instruction Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2020 0458-508-8621-A. VA4.K20. 0000008472_005_GB
MS 151 TC
English
1
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
This manual contains operating and
safety instructions for all STIHL
Professional Tree Service Chain Saws.
A professional tree service chain saw is
designed especially for in-tree
maintenance, tree surgery and other
cutting work in confined spaces such as
working from a rope and harness or from
a lift-bucket.
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 for Chain saw Users" and
"Safety Precautions" 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 23
Mounting the Bar and Chain 23
Tensioning the Saw Chain (side
chain tensioner) 25
Checking Chain Tension 25
Fuel 25
Fueling 27
Chain Lubricant 29
Filling Chain Oil Tank 30
Checking Chain Lubrication 30
Chain Brake 31
Starting / Stopping the Engine 32
Operating Instructions 35
Taking Care of the Guide Bar 36
Cleaning the Air Filter 37
Engine Management 37
Adjusting the Carburetor 37
Spark Plug 38
Storing the Machine 40
Checking and Replacing the Chain
Sprocket 40
Maintaining and Sharpening the
Saw Chain 41
Maintenance and Care 45
Main Parts 47
Specifications 49
Ordering Spare Parts 50
Maintenance and Repairs 50
Disposal 50
Limited Warranty 51
STIHL Incorporated Federal
Emission Control Warranty
Statement 51
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 53
Trademarks 55