Stihl SR 450 Product Instruction Manual - Page 32

Replacing the Air Filter, Adjusting the Carburetor

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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 3 N Remove the filter element (3). N Replace dirty or damaged filters. N Fit the new filter in the filter housing. N Fit the filter cover. N Insert the screws and tighten them down firmly. 0002BA047 KN 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 Shutting off the engine N Check the air filter and replace it if necessary. N Check that the throttle cable is properly adjusted - readjust if necessary - see chapter on "Adjusting the Throttle Cable". N Have the spark arresting screen (not all markets) checked - see "Inspection and Maintenance by Dealer". 0002BA046 KN N Turn the choke knob to c . N Loosen the screws (1). N Remove the filter cover (2). 30 SR 430, SR 450

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SR 430, SR 450
English
30
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
N
Turn the choke knob to
c
.
N
Loosen the screws (1).
N
Remove the filter cover (2).
N
Remove the filter element (3).
N
Replace dirty or damaged filters.
N
Fit the new filter in the filter housing.
N
Fit the filter cover.
N
Insert the screws and tighten them
down firmly.
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
Shutting off the engine
N
Check the air filter and replace it if
necessary.
N
Check that the throttle cable is
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
N
Have the spark arresting screen
(not all markets) checked – see
"Inspection and Maintenance by
Dealer".
Replacing the Air Filter
1
0002BA046 KN
1
2
0002BA047 KN
3
Adjusting the Carburetor