CARBURETTOR
Walbro HDA och HD
Maintain a high level of cleanliness when reassembling the carburettor. Even small particles of dirt can cause operating prob- lems.
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 high and low jet screws and springs. NOTE! Do not tighten the screws against the seats. This can damage the seats and needle tips.
4.Fit the fuel screen (D) by using the handle of a small screwdriver.
5.Fit the pump diaphragm (G), gasket
(F) and cover (E) on the pump unit.
6.Fit the needle valve (C) with lever arm, shaft and spring and tighten screw (H).
7.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.
8.Fit the control diaphragm (B) with gasket and cover (A) on the metering unit.
9.Carry out a pressure test. See page 100.
A
B
H
C
J
D 
G 
F 
E 
English – 95
