Leakage Test - Stihl MS 192 T Manual

: Carefully draw the carburetor off
the fuel return line and stud bolts
until the rods appear.
: Unhook the rod (1) from the
carburetor (arrow) and remove
the carburetor.
– Reassemble parts in reverse
order.
– Tightening torques, b 3.5
– Check correct functioning.
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14.2.1 Leakage Test

The tank vent must also be checked
and cleaned if problems develop
with the carburetor or fuel supply,
b 14.6.2
The carburetor can be tested for
leaks with the carburetor and
crankcase tester 1106 850 2905.
– Disconnect the fuel hose from the
carburetor and remove the
carburetor, b 14.2
2
1
: Push the fuel line (1)
1110 141 8600 onto the double
connector (2) 0000 855 9200.
: Push the fuel line with double
connector onto the fuel port
(arrow).
– Push the pressure hose of the
tester 1106 850 2905 onto the
double connector.
: 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. 0.8 bar (80 kPa).
1
If this pressure remains constant,
the carburetor is airtight. However, if
the pressure drops, there are two
possible causes:
1. The inlet valve is not sealing
(impurities in the valve seat,
sealing cone of the inlet needle
is damaged or
inlet control lever is sticking).
Remove to clean, b 14.3.2
2. Metering diaphragm damaged,
replace if necessary, b 14.3.1
– After completing the test, open
the vent screw (1) and pull the
fuel line off the carburetor's elbow
connector.
– Push the fuel hose onto the
elbow connector.
– Install the carburetor, b 14.2
– Tightening torques, b 3.5
– Reassemble remaining parts in
reverse order.
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MS 192 T