HT 100, HT 101, HT 130, HT 131
English
11
and rotating chain to pop out of the cut or 
kerf, go out of control and strike some 
other object.
If the bar becomes pinched and caught 
in the branch so that the chain can no 
longer move, shut off the pole pruner 
and carefully move the branch to open 
the pinch and release the bar.
WARNING
If a rotating saw chain strikes a rock or 
other hard object, sparks may be 
created, which can ignite flammable 
materials under certain circumstances. 
Flammable materials can include dry 
vegetation and brush, particularly when 
weather conditions are hot and dry. 
When there is a risk of fire or wildfire, do 
not use a power tool around flammable 
materials or around dry vegetation or 
brush. Contact your local fire authorities 
or the U.S. Forestry Service if you have 
any question about whether vegetation 
and weather conditions are suitable for 
the use of a pole pruner.
WARNING
Never modify your muffler. Any 
modification could cause an increase in 
heat radiation, sparks or sound level, 
thereby increasing the risk of fire, burn 
injury or hearing loss. You may also 
permanently damage the engine. Have 
your muffler serviced and repaired by 
your STIHL servicing dealer only.
WARNING
The muffler and other parts of the engine 
(e.g. fins of the cylinder, spark plug) 
become hot during operation and remain 
hot for a while after stopping the engine. 
To reduce risk of burns, do not touch the 
muffler and other parts while they are 
hot. Keep the area around the muffler 
clean. Remove excess lubricant and all 
debris such as pine needles, branches 
or leaves. Let the engine cool down 
sitting on concrete, metal, bare ground 
or solid wood (e.g. the trunk of a felled 
tree) away from any combustible 
substances.
WARNING
An improperly mounted or damaged 
cylinder housing or a 
damaged/deformed muffler shell may 
interfere with the cooling process of the 
muffler. To reduce the risk of fire or burn 
injury, do not continue work with a 
damaged or improperly mounted 
cylinder housing or a 
damaged/deformed muffler shell.
Your muffler is furnished with a spark 
arresting screen designed to reduce the 
risk of fire from the emission of hot 
particles. Never operate your unit with a 
missing or damaged spark arresting 
screen. If your gas/oil mix ratio is correct 
(i.e., not too rich), this screen will 
normally stay clean as a result of the 
heat from the muffler 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. Some state or federal laws or 
regulations may require a properly 
maintained spark arrestor for certain 
uses. See the "Maintenance, Repair and 
Storing" section of these Safety 
Precautions. Remember that the risk of 
a brush or forest fire is greater in hot or 
dry conditions.
WARNING
Reactive Forces
WARNING
Reactive forces may occur any time the 
chain is rotating.The force used to cut 
wood can be reversed and work against 
the operator. If the rotating chain is 
suddenly stopped by contact with any 
solid object such as a branch or is 
pinched, the reactive forces may occur 
instantly. These reactive forces may 
result in loss of control, which, in turn, 
may cause personal injury. An 
understanding of the causes of these 
reactive forces may help you avoid the 
element of surprise and loss of control.
Some STIHL power tools 
are equipped with a cata-
lytic 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 con-
ventional mufflers when 
the engine returns to idle 
or is shut off. To reduce 
the risk of fire and burn 
injuries when using a cat-
alytic converter, always 
set your power tool down 
in the upright position and 
never locate it where the 
muffler is near dry brush, 
grass, wood chips or 
other combustible materi-
als while it is still hot.