Engine Management; Adjusting The Carburetor - Stihl MS 311 Manual De Instrucciones

Installing the air filter
2
1
N Insert the lugs (1) into the
recesses (2)
N Tilt the air filter toward the filter
housing and close the clip
N Refit the shroud and tighten the
screws
MS 311, MS 391

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.

Adjusting the Carburetor

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 adjusting screws within fine
limits.
If the setting is too lean there is a
risk of engine damage due to
insufficient lubrication and
overheating.
Standard setting
LA
N Shut off the engine
N Check the air filter and clean or
replace if necessary.
N Check the spark arresting screen
(country-specific) in the muffler and
clean or replace if necessary.
English
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