STIHL 029, 039
61
- Remove the gasket and pump
diaphragm.
Note:
The diaphragm and gasket
often stick to the cover or carburetor
body. If this is the case, take
particular care when separating
them.
- If the fuel strainer in the pump
side of the carburetor body is
dirty, use a scriber to remove it
and then clean it.
Important:
If the fuel strainer is
damaged, fit a new one.
In such a case the fuel pickup body
should also be inspected and replaced
if necessary - see 11.8.
- To disassemble the carburetor,
take out the screws of the
metering chamber end cover and
lift away the cover.
- Remove the metering diaphragm
and gasket from the carburetor
body or the cover.
- Carefully separate the diaphragm
and gasket.
Note:
The diaphragms are the most
delicate parts of the carburetor. They
are subjected to continuous alternating
stresses and the material eventually
shows signs of fatigue, i.e. the
diaphragms distort and swell. Check
and replace if necessary.
Top:
Metering diaphragm with gasket
on end cover
Bottom:
Separating gasket and diaphragm
Top:
Fuel strainer in carburetor body
Bottom:
Fastening screws of metering
chamber end cover
Top:
Fuel pump end cover with
gasket
Bottom:
Pump diaphragm on
carburetor body
