![background image](http://html1.mh-extra.com/html/stihl/ms-240/ms-240_instruction-manual_1378885024.webp)
MS 240
English
22
The chain brake will operate only if the
hand guard has not been modified in any
way.
Check operation of the chain brake
Before starting work: Run engine at idle
speed, engage the chain brake (push
hand guard toward bar nose) and open
the throttle wide 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. STIHL recommends that you
have servicing and repair work carried
out exclusively by an authorized STIHL
servicing dealer. Maintain the following
servicing intervals:
At temperatures below +10°C
N
Turn the lever above the rear handle
90° counterclockwise.
N
Lift off the carburetor box cover
vertically.
N
Pry the shutter (1) out of the
carburetor box cover.
N
Slide the shutter into the slot (2) at
the bottom end of the carburetor box
cover.
N
Refit the carburetor box cover and
lock it with the lever.
Heated air is now drawn in from around
the cylinder and mixed with cold air –
this helps prevent carburetor icing.
At temperatures below -10°C
It is advisable to fit the intake air
preheating kit (special accessory) if you
use your saw in extremely cold
conditions (temperatures below -10°C,
in powder or drifting snow).
When fitted, the kit ensures that only
heated air is drawn in from around the
cylinder – this helps prevent air filter and
carburetor icing.
The shutter for carburetor preheating
must be in the "winter" position when the
intake air preheating kit is fitted.
Full-time usage:
every 3
months
Part-time usage:
every 6
months
Occasional usage:
every 12
months
Winter Operation
138BA005K
1
138BA006K
At temperatures above +20°C:
Return shutter to the "summer"
position. This is necessary to
avoid engine running problems
and overheating.
2
138BA007K
Summary of Contents for MS 240
Page 1: ...STIHL MS 240 Instruction Manual...
Page 2: ......
Page 49: ...MS 240 English 47...
Page 50: ...MS 240 English 48...
Page 51: ......
Page 52: ...www stihl com 04581650121 0458 165 0121 0458 165 0121 englisch G...