Replacing The Air Filter; Adjusting The Carburetor - Stihl SR 450 Instruction Manual

English

Replacing the Air Filter

Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
1
2
1
Turn the choke knob to c .
N
Loosen the screws (1).
N
Remove the filter cover (2).
N
28
3
Remove the filter element (3).
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Replace dirty or damaged filters.
N
Fit the new filter in the filter housing.
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Fit the filter cover.
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Fit the screws and tighten them
N
down firmly.

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.
Preparations
Shut off the engine.
N
Check the air filter and clean or
N
replace if necessary.
Check that the throttle cable is
N
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
Check the spark arresting screen
N
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
SR 430, SR 450