Stihl 064 - Page 76

STIHL 064, 066 76
11. FUEL SYSTEM
11.1 Air Filter
Top:
Removing outer filter element
Top:
Bottom: Open connector on inner filter element
1 = Carburetor box cover 1 = Inner filter element
2 = Twist lock 2 = Slotted nuts Bottom:
3 = Master Control lever 3 = Baffle O-ring on baffle
The air filter's function is to remove dust
and dirt sucked in with the combustion air
and thus help reduce wear on engine
components to a minimum.
Dirty and clogged air filters reduce engine
power, increase fuel consumption and
make starting more difficult.
The air filter should always be cleaned
when engine power begins to drop off.
In machines with digital ignition the
carburetor with compensator keeps the
fuel content in the mixture constant at all
times, irrespective of how dirty the filter is
- see also 11.2.
- Before removing the air filter, close the
choke shutter to prevent dirt falling into
the carburetor.
- Take off the carburetor box cover.
- Pull off the outer filter element. Note: If the filter fabric is dam-
aged, replace the part concerned
- Remove the slotted nuts and pull immediately.
away the baffle and inner filter
element. Installation is a reversal of the
removal sequence.
- Thoroughly wash the two ele-
ments in afresh, non-inflamm- Note: Only inner filter elements
able cleaning solution (e.g. warm with an open connector may be
soapy water). Carefully shake installed in models with compen-
dry. Encrusted dirt should be sator carburetors.
softened by immersing the filter Fit a new O-ring on the stub of the
in the cleaning solution. baffle.