Stihl FS 120 User Manual

1FS 120, FS 120 R, FS 200, FS 200 R, FS 250, FS 250 R
English / USA
BA_SE_049_008_01_20.fmPrinted on chlorine-free paper.
Printing inks contain vegetable oils; paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2007 0458 250 8621 C. M0,5. M7. CP. Printed in USA
STIHl
Contents
Guide to Using this Manual .............. 2
Safety Precautions and
Working Techniques ......................... 3
Approved Combinations of
Cutting Tool, Deflector,
Handle and Harness ....................... 19
Approved Power Tool
Attachments .................................... 21
Mounting the Bike Handle .............. 21
Mounting the Loop Handle ............. 23
Adjusting the Throttle Cable ........... 24
Fitting the Carrying Eye .................. 25
Mounting the Deflector ................... 25
Mounting the Cutting Tools ............. 26
Fuel ................................................ 30
Fueling ............................................ 31
Fitting the Harness ......................... 32
Balancing the Brushcutter .............. 33
Starting / Stopping the Engine ........ 34
Operating Instructions .................... 37
Cleaning the Air Filter ..................... 37
Motor Management ........................ 38
Adjusting the Carburetor ................ 38
Checking the Spark Plug ................ 40
Engine Running Behavior .............. 41
Lubricating the Gearbox ................. 41
Replacing Starter Rope
and Rewind Spring ......................... 42
Storing the Machine ....................... 44
Sharpening
Metal Cutting Tools ......................... 44
Maintenance Chart ......................... 45
Parts and Controls ......................... 47
Specifications ................................. 50
Special Accessories ....................... 51
Maintenance and Repairs .............. 51
STIHL Incorporated
Federal Emission Control
Warranty Statement ........................ 52
STIHL Incorporated Federal
Emission Control
Warranty Statement ........................ 54
Trademarks .................................... 56
Allow only persons who 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
and understand the maintenance and
safety precautions, starting on page 3,
before using your trimmer/brushcutter.
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, handle and harness for the
type of cutting attachment being used.
Always wear proper eye protection.
STIHL's philosophy is to continually
improve all of its products. As a result,
engineering changes and improve-
ments are made from time to time. If the
operating characteristics or the appear-
ance of your trimmer/brushcutter differs
from those described in this manual,
please contact your STIHL dealer for
information and assistance.

Stihl FS 120 Specifications

General

Power source	Gasoline
Type	Brush cutter
Cordless	Yes
Head type	Nylon line
Handle type	U-type handle
Engine power	1.8 hp
Product color	Black, Metallic, Orange
Uncertainty K	2 m/s²
Sound power level	110 dB
Fuel tank capacity	0.64 L
Vibration emission	4.9 m/s²
Engine displacement	30.8 cm³
Sound pressure level	98 dB
Cutting diameter (max)	- mm

Weight and Dimensions

Length	1760 mm
Weight	6300 g