Lotus TURBO ESPRIT Service Manual page 358

Considering the
balancing screw
SECTION LB
front carburettor, gradually unscrew the air bleed
of ONLY the carburettor barrel with the highest
mercury column, until i t i s balanced with the lower column to
within
3
mm.
Carry out the same procedure for the rear carburettor, and
if
necessary
re-adjust the throttle coupling screw to balance a l l columns to within
3
mm.
Ensure correct idle speed i s maintained.
Connect exhaust gas analyser to the inboard (Turbine) exhaust tailpipe
and note 'CO' and 'HC' readings. Screw down each idle C O adjustment
screw i n turn until 'HC' reading starts to increase, then return (unscrew)
again by a
&
turn. 'HC', as hexane, should normally be not more than
400
ppm.
C O maximum i s
1.0%.
Maintain idle speed and manometer balance throughout.
Disconnect manometer and adapton and replace blanking screws.
F i t
new anti-
tamper caps where necessary. Ensure a l l fuel pipe connections are secure.
LB .5.
-
CARBURETTOR MOUNT1
NG
The spacer plates and
'0'
rings used at this joint act a s insulators to absorb
vibration and prevent frothing of fuel i n the float chambers. It is essential that
the carburettor mountings are not overtightened,
as
the
'0'
rings may be displaced
with a resultant air leak.
A
uniform
1 .5
-
2.0
m m gap must be maintained between carburettor and
spacer plate, and between spacer plate and manifold as shown.
spacer plate/manifold
=
1.5
-
2.0
mm