Stihl BG 56 Manual De Instrucciones página 21

English / USA
Motor Management
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.
20
Adjusting the Carburetor
General Information
The carburetor comes from the factory
with a standard setting.
This setting is designed to provide an
optimum fuel-air mixture under most
operating conditions.
With this carburetor it is only possible to
make corrections with the high speed
screw within fine limits.
Standard Setting
: Shut off the engine.
: Turn high speed screw (H)
counterclockwise (max.
far as stop.
: Carefully screw the low speed
screw (L) down onto its seat. Then
open it one turn counterclockwise.
Fine Tuning for Operation in
Mountains or at Sea Level
A slight correction of the setting may be
necessary if engine power is not
satisfactory after a change in altitude
(mountains, sea level):
: Check the air filter and clean it if
necessary.
: Warm up the engine.
At high altitude
: Turn the high speed screw (H)
clockwise (leaner) – no further than
stop.
At sea level
: Turn the high speed screw (H)
counterclockwise (richer) – no
further than stop.
Adjusting Idle Speed
It is usually necessary to change the
3
/ turn) as
setting of the idle speed screw (LA)
4
after every correction to the low speed
screw (L).
BG 56, BG 66, BG 66 C, BG 86, SH 56, SH 86