Lotus TURBO ESPRIT Service Manual page 366

Page 8
Whereas o n Domestic/RoW Turbo and 912 engine carburetton the volume of
fuel delivered by the accelerator pump is adjusted
by
nut
(42),
on.Fedeml
Turbo
DHLA
4 5 M carburettors, the volume delivered is fixed, but the point
o f delivery commencement is adjustable. The correct setting is such that
+
w i t h the throttle closed, there
is
a clearance of 0.6
-
O.lmm between the
end of the pump lever and the diaphragm plunger.
Full Throttle
With
the throttle valves 412) opened, fuel from the float chamber
(46)
metered b y
the jets
(47),
enters the well (48) and mixes with air metered by the air corrector
(49).
The mixture thus formed, passes through the inner venturi (50) where i t further mixes
with air drawn through the main barrel of the carburettor, flows into the venturis
(51)
and then, through the main barrels (1 1) reaches the engine.