4-4 MACHINE TUNING
PILOT SCREW (P.S.)
The pilot screw controls volume of the air/fuel mixture in slow
range. Pilot screw specifications indicate the number of turns
back from the lightly seated position.
THROTTLE STOP SCREW
The throttle stop screw determines the full closed position of the
throttle valve.
• Turn it clockwise to raise the throttle valve.
• Turn it counterclockwise to lower the throttle valve.
ENGINE IDLE SPEED............................... !2-20
Air/fuel mixture Pilot screw turn back
Lean 3/4 turn back
1 turn back
1 and 1/4 turns back
1 and 1/2 turns back
1 and 3/4 turns back
2 turns back
Rich 2 and 1/4 turns back
CAUTION
Too high an engine idle may cause driveability failure
such as lack of engine braking and poor deceleration
during brake application.
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