8
english / USA
KM 85, KM 85 R
Catalytic converter
!Warning!
Some STIHL power tool 
models are equipped with 
a catalytic converter, 
which is designed to 
reduce the exhaust 
emissions of the engine 
by a chemical process in the muffler. 
Due to this process, the muffler does not 
cool down as rapidly as conventional 
mufflers when the engine returns to idle 
or is shut off. To reduce the risk of fire 
and burn injuries, the following specific 
safety precautions must be observed.
!Warning!
Since a muffler with a catalytic converter 
cools down less rapidly than conven-
tional mufflers, never set your power tool 
down where the muffler is near dry 
brush, grass, wood chips or other 
combustible materials while it is still hot.
Let the engine cool down sitting in the 
upright position on concrete, metal, bare 
ground or solid wood away from any 
combustible substances.
!Warning!
An improperly mounted or damaged 
cylinder housing or a damaged/
deformed muffler shell may interfere 
with the cooling effect of the catalytic 
converter. To reduce the risk of fire or 
burn injury, do not continue working with 
a damaged or improperly mounted 
cylinder housing or a damaged/
deformed muffler shell. Your catalytic 
converter is furnished with screens 
designed to reduce the risk of fire from 
the emission of hot particles. Due to the 
heat from the catalytic reaction, these 
screens will normally stay clean and 
need no service or maintenance. If you 
experience loss of performance and you 
suspect a clogged screen, have your 
muffler maintained by a STIHL Servicing 
Dealer.
Working Conditions
Operate and start your power tool only 
outdoors in a ventilated area. 
Operate the power tool under good 
visibility and daylight conditions only. 
Work carefully.
!Warning!
Your power tool produces 
toxic exhaust fumes as 
soon as the engine is 
running. These gases 
(e.g. carbon monoxide) 
may be colorless and 
odorless. To reduce the risk of serious or 
fatal injury from inhaling toxic fumes, 
never run the power tool indoors or in 
poorly ventilated locations.
!Warning!
Use of this product can generate dust 
and fumes containing chemicals known 
to cause respiratory disease, cancer, 
birth defects, or other reproductive 
harm. If you are unfamiliar with the risks 
associated with the particular dust or 
fume at issue, consult your employer, 
governmental agencies such as OSHA 
and NIOSH and other sources on 
hazardous materials. The State of 
California and some other authorities, 
for instance, have published lists of 
substances known to cause cancer, 
reproductive toxicity, etc.