Stihl MS 291 C User Manual

MS 261 C-M
English
36
During operation the chain saw
automatically adjusts to the optimum
power.
Depending on the STIHL M-Tronic
version the chain saw can be adjusted
more quickly to the optimum power in
two different ways:
– “Speeding up automatic adaptation
of the chain saw”
– “Calibrating the chain saw”
The STIHL M-Tronic version is indicated
on the approval label of the chain saw,
e.g. "M3.0" indicates the
STIHL M-Tronic version 3.0.
N If the STIHL M-Tronic version is
lower than 3.0: “Speeding up
automatic adaptation of the chain
saw”.
N If the STIHL M-Tronic version is 3.0
or higher: “Calibrating the chain
saw”.
Speeding Up Automatic Adaptation of
the Chain Saw
N Carry out five uniform cuts to length
at full throttle.
Calibrating the Chain Saw
If the external temperature is below -
10°C or the engine is cold:
N Start engine and release chain
brake.
N Warm up engine for about 1 minute
by blipping the throttle.
N Switch off engine.
To calibrate the chain saw, carry out the
following steps:
N Set master control lever to }
position.
N Engage chain brake.
N Start engine without depressing the
throttle trigger. The engine runs and
the master control lever remains in
the } position.
N Allow engine to run for at least 30 to
max. 60 seconds (A) without
depressing the throttle trigger.
WARNING
The saw chain may rotate when the
chain brake is released - risk of injury!
Hold the chain saw as described in the
Instruction Manual and do not touch the
moving saw chain.
N Release chain brake.
NOTICE
If the throttle trigger is released before
the chain saw has been fully calibrated,
calibration will be aborted. Calibration
has to be started again from the
beginning.
N Fully depress throttle trigger and
hold it there.
NOTICE
If the throttle trigger is not fully
depressed during calibration, the chain
saw may not adjust correctly. The chain
saw may be damaged.
N Fully depress throttle trigger and
hold it there.
N Depress and hold down throttle
trigger for at least 30 seconds (B).
The engine accelerates and the saw
chain rotates. The chain saw is being
calibrated. The engine speed fluctuates
and increases perceptibly during
calibration.
If the engine stops:
N try again to calibrate the chain saw.
If the engine repeatedly stops:
N Engage chain brake.
N Do not use the chain saw. Consult a
STIHL servicing dealer. The chain
saw has a fault.
As soon as the engine speed audibly
and perceptibly drops (C):
N Release throttle trigger.
M-Tronic
Andreas Stihl AG & Co. KG
XXXX XXX XXXX X M3.0
0000-GXX-3485-A0
1
min
AB C
s> 30 s30-60 s
0000-GXX-4580-A0

Stihl MS 291 C Specifications

General

Brand	Stihl
Model	MS 291 C
Category	Chainsaw
Language	English