Stihl MS 290 STIHL FARM BOSS Product Instruction Manual - Page 42

Motor Management, Adjusting the Carburetor - air filter

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Motor Management English / USA Adjusting the Carburetor 1 3 22 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. 139BA017 KN : Pull prefilter (1) upward and out. : Unscrew slotted nuts (2). : Remove main filter (3). : Separate the two halves of the filter. : Knock the filter out on the palm of your hand or blow it out with compressed air from the inside outward. In case of stubborn dirt: : Wash with STIHL universal cleaner or in a clean, non-flammable cleaning solution (e.g. warm soapy water) and dry all parts of the filter. Never use a brush to clean the fleece filter element : Always replace damaged filterelements. : Reinstall the filters. 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 adjust the engine idle speed within fine limits! MS 290, MS 310, MS 390 41

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41
MS 290, MS 310, MS 390
English / USA
:
Pull prefilter
(1)
upward and out.
:
Unscrew slotted nuts
(2)
.
:
Remove main filter
(3)
.
:
Separate the two halves of the filter.
:
Knock the filter out on the palm of
your hand or blow it out with
compressed air from the inside
outward.
In case of stubborn dirt:
:
Wash with STIHL universal cleaner
or in a clean, non-flammable
cleaning solution (e.g. warm soapy
water) and dry all parts of the filter.
Never use a brush to clean the fleece
filter element
:
Always replace damaged
filterelements.
:
Reinstall the filters.
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.
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
adjust the engine idle speed within fine
limits!
139BA017 KN
3
2
1
2
Motor Management
Adjusting the Carburetor