B
ENGINE
Fig. B11. Synchronising
the
throttle
slides
PILOT
MIXTURE
It
may
be
necessary
to
make small adjustments
to
the
pilot
mixture
to
suit different climatic conditions
and give good Idling.
Screwing
In
the
pilot air screw
J,
gives a richer
mixture
and
vlce~versa.
Whenever adjustment
Is
made
to
the
pilot air screw on
one
carburetor.
it
must be accurately repeated on
the
others.
Alter-
natively,
the
air
screw should be gently screwed
Inwards
as
far
as
possible and then unscrewed
by
about
2
turns,
the amount varying with require-
ments.
I\:
Ik
itJ/l-~
PRIMER
(OR
"TICKLER")
Depression of
the
pi
unger P Fig. 612 enriches
the
mixture
for starting purposes
by
raising
the
fuel
level
In
the
float chamber and must be used only
momentarily, since excessive Ilfloodlng"
may
cause
difficult starting.
In
this event, switch off
the
Ignition,
open
the
throttle
wide, and
operate
the
starter
pedal several times,
to
clear
the
fuel.
Repeat
the
starting procedure
without
further
priming.
NOTE:
The
primer
on
the
center
carburetor
is
operated
by
means
of
a
rocking
lever.
B16
SLOW
RUNNING
Following adjustments
to
the
pilot mixture,
the
engine Idling speed
may
require re-adJustment. It
can be Increased
or
decreased
by
movement
of
the
master screw H
Fig.
610 which controls
all
the
carburetors simultaneously.
CHOKE
CABLES
Cable
abutment
6
Fig.
610 and locknut C allows
Individual cables
to
be adjusted for length
to
ensure equal opening of the air valves.
The
single
cable between
the
control lever J and
the
trl pie
cable Junction box
Is
fitted with a sleeve adjuster K
which
serves
as
a master adjustment for
all
the
air
valves.
THROTTLE
CABLE
Excessive slackness
In
the cable
can
be
taken
up
by
adjustment
of the sleeve screw G Fig. 610 and
locknut
F.
Individual setting of the
throttle
slides is
by
means
of
adjuster D
Fig.
610 and locknut
A_
They
are
correctly
set
at
the
factory but,
If
any
adjustment
is
made, It must be Identical on each
carburetor.
(may want to try 1/2 turn first)
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