FS 310
English
11
WARNING
This clearing saw is normally to be used 
at ground level with the cutting 
attachment parallel to the ground. Use of 
a clearing saw above ground level or 
with the cutting attachment 
perpendicular to the ground may 
increase the risk of injury, since the 
cutting attachment is more fully exposed 
and the power tool may be more difficult 
to control. Never use your clearing saw 
as a hedge trimmer.
WARNING
During cutting, check the tightness and 
the condition of the cutting attachment at 
regular short intervals with the engine 
and attachment stopped. If the behavior 
of the attachment changes during use, 
stop the engine immediately, wait until 
the cutting attachment stops, and check 
the nut securing the attachment for 
tightness and the blade or head for 
cracks, wear and damage.
WARNING
A loose blade or head may vibrate, 
crack, break or come off the clearing 
saw, which may result in serious or fatal 
injury. Make sure that the cutting 
attachment is properly tightened. Use 
the wrench supplied or one of sufficient 
length to obtain the proper torque. If the 
blade or head loosens after being 
properly tightened, stop work 
immediately. The retaining nut may be 
worn or damaged and should be 
replaced. If the blade or head continues 
to loosen, see your STIHL dealer. Never 
use a clearing saw with a loose cutting 
attachment.
WARNING
Replace a cracked, damaged or worn-
out head or a cracked, bent, warped, 
damaged, dull or worn out blade 
immediately, even if damage is limited to 
superficial cracks. Such attachments 
may shatter at high speed and cause 
serious or fatal injury.
WARNING
When using rigid blades, avoid cutting 
close to fences, sides of buildings, tree 
trunks, stones or other such objects that 
could cause the power tool to kick out or 
could cause damage to the blade. 
STIHL recommends use of the nylon line 
heads for such jobs. In addition, be alert 
to an increased possibility of ricochets in 
such situations.
WARNING
If the head, blade or deflector becomes 
clogged or stuck, always shut off the 
engine and make sure the cutting 
attachment has stopped before 
cleaning. Grass, weeds, etc. should be 
cleaned off the blade or from around the 
head at regular intervals.
WARNING
To reduce the risk of unintentional 
rotation of the cutting attachment and 
injury, always shut off the engine and 
remove the spark plug boot before 
replacing the cutting attachment. To 
reduce the risk of injury, always shut off 
the engine before adjusting the length of 
the nylon line on manually adjustable 
mowing heads.
WARNING
The gearbox becomes hot during 
operation. To reduce the risk of burn 
injury, do not touch the gear housing 
when it is hot.
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 (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