16
English / USA
BR 340, BR 340 L, BR 420, BR 420 C
With the engine stopped and before 
starting, check the air intakes 
between the backplate and 
powerhead for blockages and clean 
if necessary.
A protective screen is available as a 
special accessory to keep the air 
intakes clear.
Only machines with catalytic 
converter
: Move the setting lever to idle 
position.
Machines with a catalytic converter must 
always be switched off with the setting 
lever in the idle position because the 
throttle cable will otherwise disconnect 
itself from the throttle trigger. 
The throttle cable reconnects itself 
automatically when the setting lever is 
moved to the idle position.
: Observe safety precautions – see 
chapter “Safety Precautions and 
Working Techniques”.
: Slide the stop switch (1) to # 
: Move the setting lever (2) to the 
center position – this is the 
starting throttle position
Note:
The setting lever can be used to select 
any throttle opening between idle speed 
(lower stop) and full throttle (upper stop). 
Set the lever to idle position before 
switching off the engine.
: If the engine is cold, turn the choke 
knob to g 
: If the engine is warm, turn the 
choke lever to e 
Also use this position if the engine 
has been running but is still cold.
Information 
Before You Start
373BA037 KN
Starting / Stopping 
the Engine
373BA008 KN
1
373BA009 KN
2
373BA010 KN373BA011 KN