Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
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is an economical proposition if the original one
has seen service to a high mileage. Very often a
generous allowance is made for the old unit.
22 To check the float setting, hold the
carburettor cover vertically with the float hanging
down. The distance 'a' (see Fig. 13.8) measured
between the float and the cover (with gasket
fitted) should be 7 mm ± 0.25 mm. Where
necessary, bend the float tongue.
23 This type of carburettor is fitted with a
tamperproof cap on the mixture screw, and
unless an exhaust gas analyser is available,
restrict any adjustment to the slow-running to
turning the throttle speed screw.
Carburettor overhaul – general
24 Whenever it is decided to overhaul a
carburettor, always obtain the appropriate repair
kit in advance. If throttle or choke valve plates o r
their spindles are worn, do not dismantle them
but obtain a new carburettor. A new carburettor
Fig. 13.6. Solex carburetor adjustment screw (Sec.4)
Fig. 13.7. Weber dual venturi carburettor flost setting
diagram (Sec.4)
1 – Carburettor top cover 7 – Float arm tab
2 – Fuel inlet needle valve 8 – Float arm
3 – Float stop 9 – Float
4 – Needle 10 – Gasket
5 – Return hook a = 7
± 0,25 mm
6 – Ball
A – Throttle speed screw B – Sealed mixture scre w
Fig. 13.8. Weber dual venturi carburettor (Sec.4)
1 – Throttle cable 4 – Throttle speed scre w
2 – Cable conduit 5 – Throttle control diap hragm
3 – Choke cable
Fig. 13.9. Location of mixture control screw (1) (W eber dual
venturi carburettor) (Sec.4)
