Idle Speed Adjustment; Pilot Air Screw Adjustment - Polaris RANGER RZR 170 Service Manual

MAINTENANCE

Idle Speed Adjustment

1. Start engine and warm it up thoroughly.
2. Adjust idle speed by turning the slide adjustment
screw in (clockwise)
(counterclockwise) to decrease RPM. (Refer to
illustration).
IDLE SPEED
Idle Speed
1700 ± 100
NOTE: Always check throttle cable freeplay after
adjusting the idle speed and readjust if necessary.

Pilot Air Screw Adjustment

The pilot air screw is calibrated at the factory to
meet EPA / CARB regulations for air quality
standards. Cleaning of the pilot circuit must be
performed by a certified repair shop to ensure
air quality standards are not exceeded.
1. Start the engine and verify (using a portable
tachometer) the idle speed is set to specification.
Always check throttle cable freeplay after adjusting
idle speed, and adjust if necessary.
2. Using 'D'-shaped screwdriver Special Tool PA-47361
adjust the pilot air screw setting, turn the screw
clockwise until engine idle RPM begins to decrease.
2.14
to increase or
Idle Speed
Screw
Decrease
Increase
CAUTION
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
Stop turning at this point and note the screw setting.
out
PILOT AIR SCREW
Increase
Decrease
Pilot Air Screw Base Setting:
2.25 turns out (initial)
3. Slowly turn mixture screw counterclockwise until idle
speed returns to Idle RPM. Continue turning
counterclockwise until idle RPM begins to drop. Stop
turning at this point and note the screw setting
4. Center the mixture screw between points in Step 2 and
3.
5. Readjust idle speed if not within specification.
Special Tool:
PA-47361