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Needles
The correct needle for normal and competition work is S.M.
carburettors are fitted with oil bath air cleaners use CIW needles.
The needle should be fitted with its shoulder flush with the under face of the
piston (Fig. 30). It is retained in position with a screw.
The mechanically operated fuel pump, mounted on the left-hand side of
the crankcase, provides a constant pressure of fuel to the carburettors.
hand primer is fitted, which can be used to pump fuel to the carburettors
if the float chambers are not already full, under which condition a slight
pumping resistance is felt before the lever reaches its stop. This resistance
ceases when the chambers are full.
RUNNING ADJUSTMENTS
FUEL PUMP
Fuel pump.
Fig.
31.
3 7
When the
A
SPORTS CAR
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