VESPA 1962 150, Operation & Maintenance Manual

Page: 31 / 31

INCORRECT RUNNING
1. - Lack of power
Muffler outlet pipe carbonised Clean (see page 31).
Sparkplug not well screwed into cylinder head Tighten with 21 mm box wrench.
Cylinder head not fitting properly into spigot Set the head properly and tighten
on top of cylinder the nuts uniformly
2. - Explosions at muffler and carburettor Replace or clean the plug and
correct the gap (see page 30, No.
6) to 0.6 mm (0.023 in).
3. - High fuel consumption
a) Air cleaner choked or dirty; starter device rod Clean with pure gasoline and blow
sticking in closed or partially closed position. Dry. Dip the filter into a 30%
gasoline-oil bath.
Release and
lubricate starter device control
lever.
b) Other troubles (faulty carburettor, poor cc m- See your Retailer
pression, etc.)
4. - Engine noisy - Clutch troubles - Gear pinions See your Retailer
disengage of own accord - Starter assembly not
engaging - Controls not operating properly -
Steering column becomes stiff - Inefficiency of
suspensions.
5. - Poor braking
Stroke of pedal or lever too long Adjust (see Fig. 18, page 27).
Brake linings oily or worn down Wash with gasoline and dry in air,
or replace. See your Retailer about
oil leakage
Brake drums and linings scratched Replace
6. - Faulty electric wiring
Lead terminals loose or wrongly connected Re-connect properly (see Figs. 11-
12) or replace and tighten the
screws.
Incorrect adjustment of the head lamp Re-set properly (see page 28).