Removal and installation of carburetor

Identification: Information plate in national language on cross member in front of radiator or on cylinder head cover. Adjust engines according to data of respective exhaust gas information plate.

Idle speed adjustment

National version

Idle speed 1/min

Idle speed emission value % CO

up to 1976

max. 1.5

1976

800-900

max. 1.0 without air injection

T) 1976

<psi> 1973

750-900

up to 1.5

1974 Federal

1974 California

700-900

6—8 without air injection

1975/76

800-900

max. 1.0 without air injection

National version

Engine speed

Vacuum hose pulled off

1/min

Engine speed

Driving position engaged

1/min

TN choke

TN choke

1976

1976

1700-1900

600-700

1973/74

1200-1400

1975/76

^l) When engaging all auxiliary units, the engine should still run smoothly.

07.2.2 la—194/1

Nm

(kpm)

with new insulating flange

10

(1.0)

Carburetor fastening nuts

with insulating flange used up to now

(0.8)

f ■

Oil telethermometer

116 589 27 21 00

Digital tester

001 589 54 21 00

Connecting cable 6 m long

000 589 04 90 00

I1OO4-T112          \

Intermediate plug (adaptor)

000 589 72 63 00

Trigger

000 589 71 63 00

Torque wrench 4—16 Nm (40—160 kpcm)

000 589 67 21 00

Revolution counter, CO measuring instrument

07.2.2 la-194/2

1    Remove air filter.

2   Evacuate excess pressure in cooling system by loosening radiator cap for a short moment, then tighten cap again.

3   Unscrew fuel return valve. Pull off electric cable on choke cover, plug on idle speed shutoff valves, vacuum lines and coolant hoses. Disconnect regulating rod on carburetor.

4 Unscrew carburetor fastening nuts and remove carburetor.

5 Install carburetor in vice versa sequence. Proceed as follows:

•   Check insulating flange for damage and replace, if required.

•   Pay attention to installation position and various insulating flange versions.

(@) 1973/74

(@) California 1974

Arrow = groove for drawing off fuel evaporation vapors, should point toward carburetor.

Arrow = groove for drawing off fuel and crankcase evaporation vapors, should point toward carburetor.

This insulating flange should no longer be installed for model years 1973/74.

107-9854/1

07.2.2 la-194/3

• Tighten carburetor fastening nuts uniformly and crosswise to specified torque.

To prevent distortion of carburetor, tighten with a torque wrench only and up to specified torque.

Attach vacuum lines on carburetor according to diagram.

A Vacuum connection for vacuum switch

(13) of ignition retard B Vacuum connection for switchover valve

(9)  of ignition retard

C Vacuum connection for switchover valve

(10)  of throttle valve lift by vacuum governor, as well as for fuel return valve (284)

Line colors

gr = grey bl = blue ws = white

ws

07.2.2 la-194/4

A Vacuum connection for vacuum switch (13)

of ignition adjustment B Vacuum connection for draw-off valve (38)

of fuel evaporation control system C Vacuum connection for switchover valve (9)

of ignition adjustment, decel diverter valve

of air injection, vacuum governor and fuel

return valve (284)

Line colors

bl =   blue

br =   brown

gr =   grey

gn =   green

rt =   red

ws =   white

A Vacuum connection check valve (35) of

vacuum booster for EGR B Vacuum connection for draw-off valve (38)

of fuel evaporation control system C Vacuum connection for check valve (35) of

float chamber vent system, vacuum governor

and fuel return valve (284)

Line colors

bl = br =

blue brown

gn =  green

sw =   black

vi =   purple

ws =   white

07.2.2 la-194/5

1976

A   Vacuum connection 40 °C thermovalve (60) of EGR

B    Vacuum connection for ignition advance

C    Vacuum connection for vacuum governor

D   Vacuum connection for vacuum booster (54) of EGR

Line colors

br

ge

rt vi

brown yellow red purple

6 Adjust idle speed (07.2-100).

07.2.2 la-194/6