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1
SETTING
Pilot screw adjustment
The richness of the air-fuel mixture with the
throttle fully closed to 1/4 open can be set by
turning the pilot screw 1 . Turning in the pilot
screw will make the mixture lean at low
speeds, and turning it out will enrich it.
Standard pilot
screw position
NOTE:
If the idling speed fluctuates, turn the pilot
G
screw only 1/2 of a turn in either direction.
To optimize the fuel flow at a smaller throttle
G
opening, each machine's pilot screw has
been individually set at the factory. Before
adjusting the pilot screw, turn it in fully and
count the number of turns. Record this num-
ber as the factory-set number of turns out.
Effects of adjusting the pilot screw
(reference)
Å
1/4
1
2
Å Idle
ı Fully open
1 2-1/2 turns out
2 1-1/2 turns out
3 2 turns out
7 - 5
T U N
2
(example)
ı
1/2
3/4
+5%
3
–5%
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