Stihl MS 261 Instruction Manual

MS 261, MS 261 C
English
33
felling cut. The chain brake will operate
only if it has been properly maintained
and the hand guard has not been
modified in any way.
Check operation of chain brake
Before starting work: Run engine at idle
speed, engage the chain brake (push
hand guard toward bar nose).
Accelerate up to full throttle for no more
than 3 seconds – the chain must not
rotate. The hand guard must be free
from dirt and move freely.
Chain brake maintenance
The chain brake is subject to normal
wear. It is necessary to have it serviced
and maintained regularly by trained
personnel, such as your STIHL servicing
dealer, at the following intervals:
Preheating the carburetor
N Remove the shroud – see "Shroud".
At temperatures below +50°F (+10°C):
N Use the combination wrench or a
screwdriver to ease the shutter out
of the summer position s.
N Refit the shutter the other way round
in the winter position – the arrow
points to the symbol r – the shutter
must snap into position.
The arrowhead (1) is visible in the winter
position.
N Install the shroud – see "Shroud".
Heated air is now drawn in from around
the cylinder to warm the carburetor – this
helps prevent carburetor icing.
At temperatures above +70°F (+20°C):
N Always return the shutter to the
summer position (
s ) to avoid
engine running problems and
overheating.
At temperatures below 14°F (-10°C)
It is advisable to fit the "cover plate" kit
(special accessory) if you use your saw
in extremely cold conditions
(temperatures below 14°F (-10°C), in
powder or drifting snow).
If idling behavior is erratic or
acceleration is poor:
N Turn the low speed screw (L) 1/4 of
a turn counterclockwise.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L) – see "Adjusting the
Carburetor".
N If your saw is very cold (frost or ice
on machine), start the engine and
keep it at a high idle speed (with
chain brake disengaged) until it
reaches normal operating
temperature.
Cover plate
The cover plate (special accessory)
helps prevent snow being sucked into
the machine.
When the cover plate is fitted, the
shutter must be in the winter position.
Full-time usage: every 3
months
Part-time usage: every 6
months
Occasional usage: every 12
months
Winter Operation
5902BA002 KN
5902BA003 KN
1

Stihl MS 261 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Blade length	400 mm
Automatic oiling	Yes
Oil tank capacity	0.27 L
Fuel tank capacity	0.5 L
Engine displacement	50.2 cm³
Engine power	3.8 hp
Power source	Gasoline

Weight and Dimensions

Weight	5200 g