SR 430, SR 450
English
2
Pictograms
The meanings of the pictograms 
attached to or embossed on the 
machine are explained in this manual.
Depending on the model concerned, the 
following pictograms may be on your 
machine.
Symbols in Text
Many operating and safety instructions 
are supported by illustrations.
The individual steps or procedures 
described in the manual may be marked 
in different ways:
N A bullet marks a step or procedure.
A description of a step or procedure that 
refers directly to an illustration may 
contain item numbers that appear in the 
illustration. Example:
N Loosen the screw (1).
N Lever (2) ...
In addition to the operating instructions, 
this manual may contain paragraphs 
that require your special attention. Such 
paragraphs are marked with the 
symbols and signal words described 
below:
DANGER
Indicates an imminent risk of severe or 
fatal injury.
WARNING
Indicates a hazardous situation which, if 
not avoided, could result in severe or 
fatal injury.
NOTICE
Indicates a risk of property damage, 
including damage to the machine or its 
individual components.
Engineering Improvements
STIHL’s philosophy is to continually 
improve all of its products. As a result, 
engineering changes and improvements 
are made from time to time. Therefore, 
some changes, modifications and 
improvements may not be covered in 
this manual. If the operating 
characteristics or the appearance of 
your machine differs from those 
described in this manual, please contact 
your STIHL dealer or the STIHL 
distributor for your area for assistance.
Guide to Using this Manual
Fuel tank for gasoline 
and engine oil mixture
Press to operate manual 
fuel pump
Mistblowing wet mode
Dusting and spreading 
dry mode
Flow control