Polaris 2001 ATV Universal ATV User Manual

Page 138

127

MAINTENANCE

Carburetor/Engine Idle RPM Adjustment

2 Cycle Engines

If the engine idle speed is not satisfactory, and all other conditions

are favorable, the carburetor can be adjusted as follows:

1. Warm up the engine by

running

the

vehicle

approximately five min-

utes.

2. Place the transmission in

gear with the parking

brake applied.

3. Adjust the carburetor idle

screw in or out until the

desired idle RPM is

reached.

Turning the

screw in (clockwise) will

raise RPM. Turning the

screw out (counterclock-

wise) will lower RPM.

The following variations to air screw adjustment for 2-Cycle en-

gines should be noted:

For improving cold weather start and reducing audible deto-

nation noise, the air screw can be closed from 1/2 to 1 turn

by turning the screw clockwise.

During hot weather and/or high altitude operation the air

screw can be adjusted for smooth operation by approxi-

mately 2 turns counterclockwise.

Idle

Screw

Air Screw

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