2
English / USA
KM 55
!Warning!
Because this power tool is a high-speed 
working 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.
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. 
Therefore, STIHL cannot be responsible 
for changes, modifications or 
improvements not covered in this 
manual. If the operating characteristics 
or the appearance of your power tool 
differs from those described in the two 
manuals, please contact your STIHL 
dealer for information and assistance.
In the STIHL KombiSystem a number of 
different KombiEngines and KombiTools 
can be combined to produce a power 
tool. In this instruction manual the 
functional unit formed by the 
KombiEngine and KombiTool is referred 
to as the power tool.
The KombiEngine and KombiTool  come 
with separate instruction manuals.
Always read and make sure you 
understand both instruction manuals 
before starting and using your machine. 
Keep the manuals in a safe place for 
later reference. 
Pictograms
All the pictograms attached to the 
machine are shown and explained in  
this manual.
The operating and handling instructions 
are supported by illustrations.
Symbols in text
The individual steps or procedures 
described in the manual may be marked 
in different ways:
: A bullet marks a step or procedure 
without direct reference to an 
illustration. 
A description of a step or procedure that 
refers directly to an illustration may 
contain item numbers that appear in the 
illustration.
Example:
Loosen the screw (1) 
Lever (2) ...
KombiSystem
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002BA159 KN
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Guide to Using this Manual