Husqvarna 3120 XP Workshop Manual - Page 98

Walbro WT

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Walbro WT CARBURETTOR Maintain a high level of cleanliness when reassembling the carburettor. Even small particles of dirt can cause operating problems. D 1. If the throttle and choke valves, shafts, lever arms and springs have been dismantled these must be reassembled. Lubricate the shaft bearings using a light oil. C 2. Fit the plugs (J). See page 91. J 3. Fit the "semi fixed jet" (K). See page 91. 4. Fit the high and low jet screws and springs. NOTE! Do not tighten the screws against the seats. This can damage the seats and B needle tips. A 5. Fit the fuel screen (D) by using the handle of a small screwdriver. 6. Fit the pump diaphragm (G), gasket (F) and cover (E) on the pump unit. 7. Fit the needle valve (C) with lever arm, shaft and spring and tighten screw (H). 8. Check, using or a ruler or the like, that the lever arm is level with the chamber floor. See the figure to the lower right. The lever arm can be bent if necessary to achieve the correct settings. 9. Fit the control diaphragm (B) with gasket and cover (A) on the metering unit. 10. Carry out a pressure test. See page 100. E F G H K 98 - English

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98
– English
Walbro WT
1.
If the throttle and choke valves, shafts,
lever arms and springs have been
dismantled these must be reassembled.
Lubricate the shaft bearings using a light oil.
2.
Fit the plugs (J). See page 91.
3.
Fit the ”semi fixed jet” (K). See page 91.
4.
Fit the high and low jet screws and springs.
NOTE! Do not tighten the screws against
the seats. This can damage the seats and
needle tips.
5.
Fit the fuel screen (D) by using the handle of
a small screwdriver.
6.
Fit the pump diaphragm (G), gasket
(F) and cover (E) on the pump unit.
7.
Fit the needle valve (C) with lever arm, shaft
and spring and tighten screw (H).
8.
Check, using or a ruler or the like, that the
lever arm is level with the chamber floor.
See the figure to the lower right. The lever
arm can be bent if necessary to achieve the
correct settings.
9.
Fit the control diaphragm (B) with gasket
and cover (A) on the metering unit.
10.
Carry out a pressure test. See page
100.
Maintain a high level of cleanliness when
reassembling the carburettor. Even small
particles of dirt can cause operating
problems.
CARBURETTOR
E
F
G
C
J
B
H
K
A
D