Page No: 59
Issue No: 1
Date: 031100
Issued By: PJA
mixture bypasses the main carburettor to flow into the intake manifold of the engine
direct.
During starting the throttle valve has to be closed to make sufficient vacuum
available for the starting carburettor.
When the engine is at a standstill and also during
normal operation the fuel level in the float chamber compartment incorporating the riser
will be the same as in the rest of the float chamber. When starting with opened-up
starting carburettor, the fuel will initially be drawn in from this compartment which forms
a very rich mixture. The fuel supplied subsequently will only be the amount allowed
through by the starting jet. This ensures that, once the engine has started, it is not
supplied with an excessively rich mixture and stalled. The starting carburettor is therefore
matched to any given engine by modifying the starting jet and matching the space behind
it.
The starting carburettor is secured to the carburettor housing by four screws (51) and
protected against ingress of dirt and water by the seal (50) between the two. The starting
shaft is also sealed against the starting carburettor housing by a rubber ring (49).
Carburettor Overhaul
Note: As a guide to overhaul read carburettor operation.
Summary of Contents for 3300
Page 4: ...Page No 4 Issue No 1 Date 031100 Issued By PJA List of Amendments Page Amendment Date Issue...
Page 8: ...Page No 8 Issue No 1 Date 031100 Issued By PJA 1 1 Denomination of Cylinders...
Page 11: ...Page No 11 Issue No 1 Date 031100 Issued By PJA 3 0 PERFORMANCE GRAPHS...
Page 48: ...Page No 48 Issue No 1 Date 031100 Issued By PJA...
Page 52: ...Page No 52 Issue No 1 Date 031100 Issued By PJA...
Page 67: ...Page No 67 Issue No 1 Date 031100 Issued By PJA Drawing 9430064...
Page 89: ...Page No 89 Issue No 2 Date 031100 Issued By PJA...