Carburetor; Leakage Test - Stihl 019 T User Manual

10.5

Carburetor

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.
• Push the fuel line (1)
1110 141 8600 onto the nipple
(2) 0000 855 9200.
• Push fuel line with nipple onto
carburetor elbow connector.
STIHL 019 T
• 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
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.
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.
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