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5·26
FUEL
SYSTEM
AND
THROTTLE
BODY
• Connect a tachometer.
• Start up the engine and keep it running at 1 150 rpm by turn-
ing throttle stop screw
@.
!
CAUTION
I
Avoid
drawing
dirt
into
the
throttle
body
while
running
the
engine
without
air
cleaner box.
Dirt
drawn
into
the
engine
will
damage
the
internal
engine
parts.
• Turn the air screw
@ of the gauge so that the vacuum acting
on the tube of that hose will bring the steel ball
(j) in the tube
to the center line
@.
NOTE:
The vacuum gauge is positioned approx.
30 0 from the horizon-
talleve/.
o 0 0 0
• After making sure that the steel ball stays steady at the center
line, disconnect the hose from the No.4 throttle body nipple
and connect the next hose to this nipple.
• Turn air screw to bring the other steel ball
® to the center
line.
• Repeat the above process on the third and fourth hoses.
The balancer gauge is now ready for use in balancing the throt-
tle valves.
• Connect the PAIR vacuum hose to the No.4 throttle body.
®
o 0 0 0