FIAT Uno 45 - Manual (Page 59)

3
System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear mounted fuel tank, mechanically-operated fuel pump,
downdraught carburettor
Air cleaner element
903 cc (45) and 1116 cc (55) engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion W121
1116 cc (60) and 1299/1301 cc (70) engines . . . . . . . . . . . . . . . . . . . . . Champion W136
Fuel tank
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.0 litre (9.25 gal)
Octane rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Leaded 97 RON minimum (see Supplement for use of unleaded petrol)
Fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion L101
Carburettor - calibration (dimensions in mm)
Weber 32 ICEV 50/250/1
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 903 cc engine
Venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Auxiliary venturi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5
Main jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.12
Air bleed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.70
Emulsion tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F89
Idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.47
Air idle jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.60
Pump jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.40
Pump outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.40
Superfeed jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.80
Superfeed mixture jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.50
Fuel inlet needle valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50
Anti-syphon device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.00
Idle mixture adjustment hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50
Float setting (fuel level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5 to 11.0
Float setting (travel/stroke) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.0
Fast idle (throttle valve gap) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.75 to 0.80
Accelerator pump delivery (ten strokes) . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 to 5.5 cc
Chapter 3 Fuel system
For modifications, and information applicable to later models, see Supplement at end of manual
Accelerator cable - adjustment and renewal . . . . . . . . . . . . . . . . . . 17
Air cleaner - servicing, removal and refitting . . . . . . . . . . . . . . . . . . .
2
Carburettor - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Carburettor idle speed and mixture - adjustment . . . . . . . . . . . . . . . 7
Carburettor (Solex C32 DISA 12) - servicing and adjustment . . . . . . 13
Carburettor (Solex C30 - 32 CIC/1) - servicing and adjustment . . . . 15
Carburettor (Solex C32 DISA 11) - servicing and adjustment . . . . . . 10
Carburettor (Weber 30/32 DMTR 90/250) - servicing and
adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Carburettor (Weber 32 ICEV 50/250/1) - servicing and adjustment . . 9
Carburettor (Weber 32 ICEV 51/250) - servicing and adjustment . . . 12
Carburettors (Weber 32 ICEE/250 and Solex C32 DISA 14) -
description and adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Carburettors - general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Choke control cable - removal and refitting . . . . . . . . . . . . . . . . . . . 18
Description and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Economy meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fault finding - fuel system . . . . . . . . . . . . . . . . . . . See end of Chapter
Fuel level transmitter - removal and refitting . . . . . . . . . . . . . . . . . . .
4
Fuel pump - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Fuel tank - removal and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Manifolds and exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3•1
Specifications
Contents
Easy, suitable for
novice with little
experience Fairly easy, suitable
for beginner with
some experience Fairly difficult,
suitable for competent
DIY mechanic Difficult, suitable for
experienced DIY
mechanic Very difficult,
suitable for expert DIY
or professional
Degrees of difficulty
5 4 3 2 1