Stihl MS 391 Safety Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2010 0458-542-0121-B. M1-7.G10.FST. 0000001812_006_GB
MS 311, MS 391
English
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Contents
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
This machine 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 machine.
Please contact your dealer or our
sales company if you have any
queries concerning your machine.
Your
Hans Peter Stihl
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Cutting Attachment 14
Mounting the Bar and Chain 14
Tensioning the Chain 15
Checking Chain Tension 15
Fuel 16
Fueling 17
Chain Lubricant 18
Filling Chain Oil Tank 19
Checking Chain Lubrication 19
Chain Brake 20
Winter Operation 21
Starting / Stopping the Engine 22
Operating Instructions 25
Oil Quantity Control 26
Taking Care of the Guide Bar 26
Air Filter System 27
Cleaning the Air Filter 27
Adjusting the Carburetor 28
Spark Arresting Screen in Muffler 29
Spark Plug 30
Replacing the Starter Rope and
Rewind Spring 31
Storing the Machine 33
Checking and Replacing the Chain
Sprocket 33
Maintaining and Sharpening the
Saw Chain 34
Maintenance and Care 38
Minimize Wear and Avoid Damage 40
Main Parts 41
Specifications 42
Special Accessories 43
Ordering Spare Parts 44
Maintenance and Repairs 44
EC Declaration of Conformity 44
Quality Certification 45

Stihl MS 391 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Automatic oiling	Yes
Oil tank capacity	0.35 L
Fuel tank capacity	0.6 L
Engine displacement	64.1 cm³
Engine power	4.4 hp
Power source	Gasoline

Weight and Dimensions

Weight	6200 g