Owner's Manual

20
English / USA
BR 340, BR 380
General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum
fuel-air mixture under most operating
conditions.
With this carburetor it is only possible to
correct the adjustment of the high speed
screw within fine limits.
If the setting is too lean, there is a
risk of engine damage due to
insufficient lubrication and
overheating.
Standard Setting
: Shut off the engine.
: Turn the high speed screw (H) and
low speed screw (L) counter-
clockwise as far as stop (max.
1
/
4
turn).
Adjusting Idle Speed
Engine stops while idling
: Carry out standard setting on the
low speed screw.
: Turn idle speed screw (LA)
clockwise until the engine runs
smoothly.
Erratic idling behavior, poor
acceleration
: Carry out standard setting on the
low speed screw.
: Turn low speed screw (L)
counterclockwise until the engine
runs and accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA)
after every correction to the low speed
screw (L).
Adjusting the Carburetor
H
L
373BA043 KN
LA
L
373BA044 KN