English
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:
Full-time usage:
Part-time usage:
Occasional usage:
34
Information Before You Start
The three positions of the Master
Control lever:
Stop 0 – engine off – the ignition is
switched off.
every 3
Normal run position F – engine runs or
months
can fire.
every 6
To move the Master Control lever from F
months
to n, press down the throttle trigger
every 12
lockout and squeeze the throttle trigger
months
at the same time.
Starting throttle position n – 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.
Starting / Stopping the
Engine
Positions of Choke Shutter
STOP
Choke shutter closed l – for starting
the engine
Select this position:
if the engine is cold
–
if the engine stalls when you open
–
the throttle after starting.
if the fuel tank was run until empty
–
(engine stopped).
Choke shutter open j – for starting the
engine
Select this position:
if the engine is warm, i.e. if it has
–
been running for about one minute.
When the engine begins to fire
–
after clearing a flooded combustion
–
chamber.
Setting the Master Control Lever
To move the Master Control lever from
the normal run position (F) to starting
throttle (n), press down the throttle
trigger lockout and squeeze the throttle
MS 193 C