2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 115Get this manual
FUEL SYSTEMCARBURETION 5Install the pilot mixture screw, spring, washer, and O-ring as an assemblyLubricate the O-Ring with oil or light grease before installationCAUTION: Do not damage the O-ring during installationTurn the screw in until it lightly contacts the seatBack out the specified number of turnsNOTE: The final pilot (idle) mixture must be adjusted with the engine runningRefer to Page 2.12Pilot Mixture Screw Base Setting (Set at Factory) Refer to Specifications Page 1.4 BST 40
FLOAT HEIGHT ADJUSTMENT
1Place the carburetor on level surface as shown at right to remove weight from float armIn this position, the float tongue will rest lightly on the inlet needle valve pin without compressing the spring