Stihl 064 Service Manual page 83

STIHL 064, 066
1 = Valve jet
2 = Fixed jet (066)
- When inserting the valve jet and
fixed jet, make sure they are
exactly vertical in their bores.
Press the jets home until they are
flush with the metering chamber.
- On the 064, fit a new O-ring in
the bore for the fixed jet. Press
home the fixed jet, small
diameter first, and secure it with
the retaining ring.
Note: The fixed jet "68" (with
0.68 mm orifice) installed in
model 064 saws enables the
engine to be tuned for optimum
performance up to an altitude of
approx. 2,000 m (6,500 ft) above
sea level. A smaller fixed jet "64"
(high altitude jet) can be installed
for operation at higher altitudes.
Correct position of inlet control lever
- Fit the inlet needle and the heli-
cal spring in their respective
bores. Insert spindle in the inlet
control lever, engage clevis in
annular groove on the head of
the inlet needle and tighten down
the round head screw. Make sure
that the helical spring locates on
the control lever's nipple.
Important: The upper edge of the
inlet control lever must be flush
with the metering diaphragm seat-
ing face. If necessary, use suitable
pliers to carefully bend the lever.
- Check easy action of the inlet
control lever.
-
Locating pegs on body
- Fit the gasket, metering dia-
phragm and end cover. The
metering diaphragm and gasket
are held in position by the inte-
grally cast pegs on the carburetor
body.
Note: An end cover with compen-
sator can be installed in place of
the normal end cover if the connec-
for stub on the inner filter element
is opened up and carefully de-
burred.
- Insert the fuel strainer at the
pump side. Fit the pump dia-
phragm, gasket and end cover
and tighten down securely. The
pump diaphragm and gasket are
held in position by the integrally
cast pegs on the end cover.
- Refit the carburetor adjusting
screws.
- Carry out leakage test, see 11.3,
after installing the carburetor.
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