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ENGINE: FUEL SYSTEM
87
Fig. 144 • View of Weber carbure10r from choke control
lever end.
48. Choke conlrollever. - 53. Choke control cable guide plate screw. -
54. Choke control cable terminal.
under pressure from the spring (42), forcing fuel
through the delivery ball valve (35) and via the
passage (36) to the calibrated pump jet (34) where
it is injected into the throttle barrel.
The easy starting device (fig. 143) consists of the
choke valve (44) riding offset to the throttle spindle
(45), which is connected to the control lever (48)
through the spring (41).
When the easy starting knob on floor tunnel is
pulled out to its fullest extent for cold starting, the
lever (48) shifts to the position
«A~)
(fig. 143) so
that the throttle (44) blanks the carburetor air suc-
tion, while the main throttle (21) is set in a certain
opening position through the rod (49) which con-
neets the lever (48) and the lever (60) on the main
throttle spindle (51, fig. 143).
Suction vacuum from the cranked engine rises
to rather important values as a result of the throttle
(44,
fig.
143) restriction: the discharge tube (27)
will deliver therefore a high rated mixture which
enables quick starting of engine.
Once the engine has started, the suction vacuum
causes the throttle (44) to open partially against the
spring (47), so that the mixture delivered will be
rich enough to enable the engine to run properly
although cold.
When the engine begins to warm up, the choke
throttle (44) should be opened gradually and the
main throttle (21) closed through the rod (49); as
soon as the rated temperature of the engine has
been reached, the easy starting device must be
cut off. The choke throttle (44) is held in the wide
open position by the lug (46) of lever (48), while
the main throttle (21) shifts to the idling position.
Instructions for Using the Easy Starting
Device.
The following instructions should be observed in
order to obtain maximum benefit from the device:
STARTING COLD ENGINE
Pull the easy starting knob on floor tunnel all
the way out to throw in the choke device.
WARMING UP ENGINE
During this period, whether the vehicle is sta-
tionary or moving, the knob should be returned
gradually and with short pauses to the off position,
Fig. 145.
Interior view
of Weber carburetor
body and cover.
2. Air bleed jet. - 9. Fuel inlet connector. _
13. float. - 23. Primary Venturi. - 26. Aux-
iliary Venturi. - 27. Discharge tube. -
28. Idle air bushing. - 34. Accelerator
pump jet. • 35. Pump delivery valve. _
41. Pump suction valve. - 43. Pump
control rod. - 57. Pump spring retaining
plate.
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