Pilot Screw Adjustment; Engine Idling Speed Adjustment - Orion AGB-21G Service Manual

PILOT SCREW ADJUSTMENT

ENGINE IDLING SPEED ADJUSTMENT

PILOT SCREW ADJUSTMENT
1. Adjust:
Pilot screw
Adjustment steps:
NOTE:
To optimize the fuel flow at a smaller throttle
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.
Turn in the pilot screw until it is lightly
seated.
Turn out the pilot screw by the factory-set
number of turns.
ENGINE IDLING SPEED ADJUSTMENT
1. Start the engine and thoroughly warm it
up.
2. Attach:
Inductive tachometer
To spark plug lead.
3. Adjust:
Engine idling speed
Adjustment steps:
Adjust the pilot screw.
Refer to "PILOT SCREW ADJUSTMENT"
section.
Turn the throttle stop screw
engine runs at the lowest possible speed.
To increase idle speed
tle stop screw
To decrease idle speed
tle stop screw
3 - 10
Pilot screw:
1-5/8 turns out (example)
A
in .
out B .
Engine idling speed:
1,400 ~ 1,600 r/min
until the
Turn the throt-
Turn the throt-