Stihl 019 T - carburetor; carburetor leakage test

STIHL 019 T
44
10.5 Carbureto
r
10.5.1 Leakage Test
Troubleshooting chart - see "General
Servicing, Troubleshooting" handbook.
Important: In the event of trouble with
the carburetor or the fuel supply
system, also check and clean the tank
vent - see 10.3.
The carburetor can be tested for leaks
with the carburetor and crankcase
tester 1106 850 2905.
- Remove the fuel tank - see 10.4.
In either case the carburetor must be
removed and serviced - see
"Carburetor" handbook.
- After completing test, open the vent
screw and pull the fuel line off the
elbow connector.
- Install the fuel tank - see 10.4.
• Push the nipple into the tester's
pressure hose.
• Push the fuel line (1)
1110 141 8600 onto the nipple
(2) 0000 855 9200.
• Close the vent screw (1) on the
rubber bulb (2) and pump air into the
carburetor until the pressure gauge
shows a reading of approx. 0.4 bar
(5.8 psi).
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.
• Push fuel line with nipple onto
carburetor elbow connector.