7
.16)
Carbu
retof
actuation
The
throttle
valves
are actuated by
separate cables.
The
throttle
lever must
allow two
cable connections and
provide
an action navel of 65
mm
(2
V2").
The
actuating
force is
6
N
(1,32
lb.). For smooth
idling,
synchronization
at the throttle
valves
is
necessary. When synchronizing,loosen both
throttle cables.
The
mixture
screws are set to the same open
position
(primary
setting
1 1/4 turn
open).
There are
two
possible
ways
to
synchronize the carburetors.
7
.L6.1)
Fneumatic
synchronization
With suitableflowmeters
(synchrotester)
ordepression
gauges
both
carburetors
are
adjusted to equal
flow ratc
at
idling.
With alternating accelerationoneach carburetorrespectively,
the mixture screwscan
be fine-adjusted
to achieve
equal response to thronle
movement
on
both
carbureton.
7 .L6.2) Mechanical
synchronization
Turn
back stop screws so that
throttle
valves close
fully. After that
turn stop screw
in
again until
it
touches
the
stop on
the
lever.
Now, from
this
basic
position
adjust
both
stop screws
equally till
you
reach
the correct
idle
speed.
For
adjusting
the
mixture
screws
proceed
as
abovc.
Subsequently adjust
cables
for
simultaneous
opening of the throttles.
7.17)
Starting-carburetor
actuation
The starting
carburetors
are actuated by separate cablcs too.
The action travel on the cable is
around
23 mm
(15/16").
The
actuating force is
ryprox.
16 N
(3,5
lb.). Ensure
the complete
closing of
the starting
carburetor.
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