VESPA ET4 50 Specifications download pdf (Page 108)

- Take up the fuel by means of a graded burette.

N.B.

THE MEASUREMENT MAY BE FALSIFIED BY THE INCOR-

RECT NUMBER OF REVS OR BY THE WRONG POSITION

OF THE TUBE.. IN THIS CASE, THE TENDENCY IS TO OB-

TAIN A REDUCED FUEL FLOW RATE. THE SUCTION OUT-

LET ON THE MANIFOLD HAS A SECTION INTENTIONALLY

REDUCED FOR THE PURPOSE OF ENHANCING THE SUC-

TION PULSATION AND THEREBY GUARANTEE A CON-

STANT TAP FLOW RATE.

Specific tooling

020329Y MityVac vacuum-operated pump

Characteristic

Minimum flow rate

20 cc

- Completely empty the gas tank.

- Remove the petrol delivery tube and the suction

tube.

- Loosen the clip and remove the tap.

- Clean the tank and the filter of the tap with a spe-

cific solvent.

- Refit the tap making sure that there is an O-Ring.

- Turn the tap to the direction it had before it was

removed and block the clip.

N.B.

THE FILTER CAN BE UNSCREWED FROM THE COCK TO

FACILITATE CLEANING.

Removing the carburettor

- To detach the carburettor from the engine, re-

move the two clamps anchoring the carburettor to

the inlet manifold and the air intake coupling to the

filter.

- Remove the fuel supply pipe.

- Disconnect the starter connection.

- Detach the accelerator cable with the sheath that

connects the plate and the support.

- Remove the carburettor.

Engine ET4 50

ENG - 108

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VESPA ET4 50 Specifications Page 108