Winter Operation; Starting / Stopping The Engine - Stihl MS 231 Instruction Manual

English
Part-time use:
occasional use:

17 Winter Operation

17.1 Pre-heating carburetor
► Remove the shroud – see "Shroud"
17.1.1 At temperatures below +10 °C
► Using a screwdriver, pry the shutter out of
the s (summer operation) position
► Place the shutter with the opening in the direc‐
tion of the chain saw in the r position (winter
operation) – shutter must audibly snap into
place
► Fit the shroud – see "Shroud"
Heated air is now drawn in from around the cylin‐
der and circulates around the carburetor – this
helps prevent carburetor icing.
17.1.2 At temperatures above +20 °C
► Ensure that the shutter is always returned to
position s (summer operation), otherwise the
engine may malfunction due to overheating
17.2 At temperatures below -10 °C
► if the chain saw is extremely cold (frost forma‐
tion) – after starting, bring the engine up to
operating temperature at increased idle speed
(disengage chain brake!)
24
every six months
annually
In case of erratic idling behavior or poor acceler‐
ation
► Turn the low speed screw (L) 1/4 turn counter‐
clockwise
Whenever the low speed screw (L) has been
adjusted, it is usually also necessary to adjust
the idle speed adjusting screw (LA), see "Setting
the carburetor".
17.3 Air filter system
► Retrofit new air filter if necessary – see "Air fil‐
ter system"
18 Starting / Stopping the
Engine
18.1 Positions of Master Control
Lever
0
Stop 0 – engine off – the ignition is switched off
Normal run position F – engine runs or can fire.
Starting throttlen – this position is used to start
a warm engine. The Master Control lever moves
to the normal run position as soon as the throttle
trigger is squeezed.
Choke shutter closed l – this position is used to
start a cold engine.
17 Winter Operation
STOP
0458-737-8321-C