Stihl MS 440 - 12 Fuel System; Air Filter

65MS 440, MS 440 C
Dirty air filters reduce engine power,
increase fuel consumption and
make starting more difficult.
The air filter should be cleaned
when there is a noticeable loss of
engine power.
Machines with box filter
: Take out the retaining nut (1).
: Remove the carburetor box
cover (2).
VA
176RA002
1
2
: Pull off the air filter (1).
– Thoroughly wash the air filter and
blow through with compressed
air; it must be replaced if
damaged.
VA
176RA003
1
: Unscrew the slotted nuts (1+2).
: Pull off the baffle in the direction
indicated.
VA
175RA018
1 2
: Remove the filter base.
– Thoroughly wash the filter fabric
in the filter base in a clean, non-
flammable cleaning solution and
blow through with compressed
air; it must be replaced if
damaged.
VA
175RA019
The filter base must be replaced if
the filter fabric is damaged.
Reassemble in the reverse
sequence.
Machines with HD filter
: Take out the retaining nut (1).
: Remove the carburetor box
cover (2).
VA
176RA249
2
1
: Pull the air guide (1) up and off.
VA
176RA250
1
: Remove and replace the
pre-filter (1).
: Remove the air filter (2) and
replace the internal filter
cartridge.
VA
175RA026
1
2
12. Fuel System
12.1 Air Filter