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•
Push the fuel hose with nipple
onto the carburetor elbow
connector.
•
Push the nipple into the tester’s
pressure hose.
•
Close the vent screw (1) on the
rubber bulb (2) and pump air into
the carburetor until the pressure
gauge (3) shows a reading of
approx. 8 kPa (0.8 bar).
If this pressure remains constant,
the carburetor is airtight. However,
if it drops, there are two possible
causes:
1. The inlet needle is not sealing
(foreign matter in valve seat or
sealing cone of inlet needle is
damaged or inlet control lever
sticking).
2. The metering diaphragm is
damaged.
- After completing test, open the
vent screw and pull the fuel hose
off the elbow connector.
- Push the fuel hose onto the
elbow connector.
- Install the air filter -
- Remove the air filter -
•
Pull both fuel hoses off the elbow
connectors.
•
Disconnect throttle cable nipple
(1) from slotted pin (2) on throttle
lever.
•
Pull vent hose off the filter
housing.
FS 25-4, 65-4
33