Winter Operation - Stihl MS 261 C-M Instruction Manual

English
due to kickback: Saw chain is blocked - and
stops running.
14.2 Disengage the chain brake.
► Pull the hand guard back towards the front
handle.
NOTICE
The chain brake must be released before open‐
ing the throttle (except during functional check‐
out) and before sawing.
Running the engine at high revs with the chain
brake engaged (chain locked) will quickly dam‐
age the engine and chain drive (clutch, chain
brake).
The chain brake is also activated by the inertia of
the front hand guard if the kickback force of the
saw is high enough: The hand guard is acceler‐
ated toward the bar nose – even if your left hand
is not behind the hand guard, e.g. during felling
cut.
The chain brake will operate only if the hand
guard has not been modified in any way.
14.3 Checking Operation of the
Chain Brake
Before starting work: Run engine at idle speed,
engage the chain brake (push hand guard
towards bar nose) and open the throttle wide for
(no more than 3 seconds) – the chain must not
rotate. The hand guard must be free of dirt and
easily moveable.
14.4 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 recom‐
mends that maintenance and repair work be car‐
ried out only by authorised STIHL dealers. The
following intervals must be complied with:
Full-time use:
22
quarterly
Part-time use:
occasional use:

15 Winter Operation

15.1 Preheating the carburetor
► Remove the shroud – see "Shroud".
15.1.1 At temperatures below +10°C
► Use the combination wrench or a screwdriver
to ease the shutter out of the summer posi‐
tion s.
► Refit the shutter the other way round in the
winter position – the arrow points to the sym‐
bol r – the shutter must snap into position.
The arrowhead (1) is visible in the winter posi‐
tion.
► Install the shroud – see "Shroud".
Heated air is now drawn in from around the cylin‐
der to warm the carburetor – this helps prevent
carburetor icing.
15.1.2 At temperatures above +20°C
► Return the shutter to the summer position s .
15 Winter Operation
every six months
annually
1
0458-153-8221-C