Stihl FS 311 User Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2020 0458-433-8621-A. VA5.G20. 0000007421_011_GB
FS 311
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 trimmer /
brushcutter.
To receive maximum performance and
satisfaction from your STIHL trimmer /
brushcutter, 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 /
brushcutter. 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 / brushcutter 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 or limit stop, 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, Limit Stop
and Harness 18
Mounting the Bike Handle 20
Adjusting the Throttle Cable 21
Mounting the Deflector 21
Mounting the Cutting Attachment 22
Fuel 26
Fueling 28
Fitting the Full Harness 29
Balancing the Machine 30
Starting / Stopping the Engine 30
Transporting the Unit 32
Operating Instructions 34
Replacing the Air Filter 34
Engine Management 34
Adjusting the Carburetor 35
Spark Arresting Screen in Muffler 35
Spark Plug 35
Storing the Machine 37
Sharpening Metal Cutting Blades 37
Maintaining the Mowing Head 38
Maintenance and Care 40
Main Parts 42
Specifications 44
Maintenance and Repairs 45
Disposal 45
Limited Warranty 45
STIHL Incorporated Federal
Emission Control Warranty
Statement 46
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 48
Trademarks 50

Stihl FS 311 Specifications

General

Type	2-in-1 Brush cutter & String trimmer
Cordless	Yes
Head type	Blade
Handle type	U-type handle
Engine power	1.9 hp
Product color	Black, Metallic, Orange
Uncertainty K	2 m/s²
Rotational speed	8500 RPM
Number of strokes	4
Sound power level	110 dB
Fuel tank capacity	0.71 L
Engine displacement	36.3 cm³
Sound pressure level	99 dB
Cutting diameter (max)	480 mm
Power source	Gasoline

Weight and Dimensions

Length	1800 mm
Weight	7200 g