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2
OPERATION
No MA.
142-00
:Cbaracteris/ics
and
special
j~,attlr~s
o/the
carhrrre~~or
7
6
8
9
1 ) Acceleration
pump injector
2 ) 1st choke
petrol
idling
jet
3 ) 1st choke
idling
speed
air jet
4 ) Air correction
jet with
emulsion
tube
and 1st choke
main jet
-(5
)
Air correction
jet with emulsion
tube
and 2nd choke
main jet
-16
)
2nd choke
idling
jet
-(7
)
2nd choke
idling
speed air jet
1. Location
of main
adjustments
on carburettor
( cover
removed
) :
2. Adjustment
of positive
opening
of
1st
choke
butterfly
(strangler
flap
fully
closed
) :
Set strangler
flap control
lever
( 14 ) to
fully
closed
position.
Hold butterfly
control
lever
( 13 ) in closed
position
so that stop (12)
contacts
edge of
lever
( 14 ).
Measure
distance
between
the edge of the
first choke
butterfly
and the carburettor
body.
This
measurement
must he :
a = 1.25?
0.05
mm
If not, adjust
the positive
opening
distance
of the
butterfly
by means of adjusting
stop ( 12 ). This
clearance
should
always
he measured
with ad-
justing
stop lock-nut
( 11 ) fully
tightened.
3. Adjustment
of clearonce
of
strangler
flap
(13)
activated
by vacuum
capsule
(10).
Actuate
strangler
flap control
lever
( 14) and
maintain
in fully
closed
position.
Fit VCICUUII~ gouge
on V~CUUIII capsule
( 10 ).
With minimum
v(~cu"m depression
of 400 mm of Hq
the thrust
lever
(8 ) should
come into contact
with
stop (9 ). If not, replace
YClCUUrn capsule
( 10 ).
With these
setti"gs,meosureme"t
(G a aa taken
between
the edge of the strangler
flap and the
bore must
be between
3.25
and
3.75
mm.
If not, adjust
stop screw
(3).
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