Engine Management; Adjusting The Carburetor - Stihl SH 56 Instruction Manual

English
Installing the filter
N Fit the filter in the filter housing and
push the retainer into position.
N Refit the filter cover and turn the
filter cover lock to the horizontal
position,
18

Engine 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.
BG 56, BG 56 C, BG 66, BG 86, BG 86 C, SH 56, SH 56 C, SH 86, SH 86 C

Adjusting the Carburetor

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
adjust the high speed screw within fine
limits.
Standard Setting
N Shut off the engine.
N Turn high speed screw (H)
counterclockwise (no more than a
3/4 turn) as far as stop.
N
Turn the low speed screw (L)
carefully home as far as stop and
then open it 1 full turn.
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 when operating at high
altitude or at sea level.