2006 Polaris Scrambler 500 2x4 Owners Manual - Page 83

MAINTENANCE AND LUBRICATION Carburetor IMPORTANT: Your Polaris ATV is calibrated at the factory for optimal performance at altitudes ranging from zero to 6,000 feet (1800 m) and temperatures of +40 degrees F. (4 degrees C.) or higher. Above 6000 feet (1800 m) the engine air/fuel mixture becomes overly rich and the engine loses approximately 3% of its power for each 1000-foot (304.8 m) increase in elevation. Although this power cannot be regained, adjustments to the carburetor and drive system can be made to allow more efficient operation. Optional jets, available from your Polaris dealer, are required for operation above 6,000 feet and temperatures below +40 degrees F. (4 degrees C.) NOTE: Continuous operation of the engine without proper jetting when required can cause poor performance, overheating and engine or PVT damage. See your Polaris dealer for more information about jetting the ATV for conditions in your area. If the engine idle speed is not satisfactory, and all other conditions are favorable, the carburetor can be adjusted. 1. Warm up the engine by running the vehicle for approximately five minutes. 2. Place the transmission in gear and engage the parking brake. 3. Adjust the carburetor idle screw (1) either in or out until the desired idle RPM is reached. Refer to the specifications section beginning on page 104 for the proper setting. NOTE: Turn the screw in (clockwise) to raise RPM. Turn the screw out (counterclockwise) to lower RPM. 1 80