Owner's Manual

20
English / USA
BR 340, BR 340 L, BR 420, BR 420 C
: Clean the filter cover and filter
chamber.
: Install the main filter and prefilter
elements in the filter cover.
: Fit the cover on the filter base (5)
and tighten it down firmly.
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
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.
Motor Management Adjusting the Carburetor