MG MGB User Manual

THE FUEL
SYSTEM
21.
22.
.
Throttle
cable retaining
nut.
.
Choke cable retaining
screw.
.
Breather
pipe.
.
Fuel feed hose.
Vent hose.
SthNb"
Using
the exhaust
gas
analyser,
check that the carbon
monoxide
percentage
is
within the limits
given
in
‘ENGINE
TUNING
DATA’. If the reading
falls
outside
the limits,
reset
both
jet
adjusting
screws
by
the
same
but
minimum
amount
necessary
to
bring
the
reading
just
within the limits.
If
an
adjustment
exceeding
half
a
tum
is
required
to
achieve
this, the
carburetters
must
be
removed and
serviced.
Stop
the
engine
and
set
the
throttle
interconnection
rod levers
so
that
a
clearance
of 0.012
in.
(0,31
mm.)
exists
between
each lever link
pin
and
the lower
arm
of
its
respective
throttle lever
fork.
a.
Insert
a
0.012
in.
(0.31 ,mm.) feeler
gauge
lever between
the
throttle
interconnection
rod
stop
lever
and the cold
start
interconnection
rod.
b.
Move each
throttle interconnection
lever
downwards until
each lever
link
pin
rests
on
the
lower
arm
of
its
respective
throttle lever
fork.
Tighten the
throttle interconnection
rod lever
clamp bolts,
ensuring
that
the
throttle
interconnection
rod has
an
end-■oat
of
approximately
1/32
in.
(0.8
mm.).
Remove
the
feeler
gauge.
Fig.
D.14
Carburetter installation
(S.U. HIF4)
“39°r'0‘
24.
25.
26.
27.
28.
4NC062
.
Distributor
vacuum
pipe.
Return
springs.
Carburetter
securing
nu
ts.
.
Insulation
block.
10.
23.
Heat
shield.
Run
the
engine
at
1,500
r.p.m.
and re-check
the
carburetter balance
to
ensure
that the throttle
linkage
is
connected correctly.
Ensure that
the fast idle
cam
lever
of each carburetter
is
against
its respective
stop
and
tighten the
cold
start
interconnection
rod lever
clamp
bolts
so
that
both
cam
levers
begin
to
move
simultaneously
when the
mixture
control
is
operated.
Ensure that the fast idle
cam
lever
of each
carburetter
is
against its respective
stop
and
check that
the
mixture
control cable has
1/16
in.
(1.5
mm.)
free
movement
before
it
commences
to operate
the
cam
levers.
Pull
out
the
mixture
control
(choke)
until the
arrow
marked
on
the
cam
is
positioned under the fast idle
adjusting
screw.
Run
the
engine
and
using
the balance
meter
or
‘listening
tube’
to
ensure
equal adjustment,
turn
the
fast
idle adjusting
screws
to set
the
engine
fast idling
to
the speed
given in
‘ENGINE
TUNING
DATA’.
Refit the
air
cleaners.
MGB. Issue1. 86842

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English