Stihl 064 Service Manual page 82

STIHL 064, 066
Top:
Damaged inlet needle
Bottom:
Pressing out valve jet
If there is an annular indentation
on the sealing cone of the inlet
needle, it will be necessary to re-
place the inlet needle because it
will no longer seal properly. This is
indicated by constant flooding of
the carburetor even though the
needle is clean.
- Use a 4 mm (approx. 5/32") dia.
drift to press the valve jet out of
its seat and wash it in white spirit.
Top:
Carburetor adjusting screws
Bottom:
Pressing out fixed jet (066)
- Remove the carburetor adjusting
screws.
- Use a 3 mm (approx. 1/8") dia.
drift to press the fixed jet of the
066 out of its seat wash it in
white spirit.
- On the 064, use a scriber to pry
out the retaining ring. Remove
the fixed jet and O-ring.
- Pry the sealing plug out of the
metering chamber.
Top:
Removing fixed jet (064)
1 = Retaining ring
2 = Fixed jet
3 = O-ring
Bottom:
1 = Semi-fixed jet
2 = Sealing plug
Caution: The sealing plug is de
stroyed during removal. It should,
therefore, only be removed if a re
placement is available.
Wash the carburetor body and all
serviceable parts in fresh white
spirit and blow clear with com
pressed air, paying special atten-
tion to the bores and ports.
The carburetor in the 066 is
equipped with a semi-fixed jet
which cannot be removed. Blow it
clear with compressed air.
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