1999 Ski-Doo Factory Shop Manual Volume Two, Page 60Get this manual
Section 03 TROUBLESHOOTING Subsection 02 (ENGINE)
SYMPTOM CONDITION TestInspection
IRREGULAR ENGINE IDLENORMAL USE AFTER ENGINE WARM UP1Check primeraFuel leaks at primer nipple which is mounted to carburetorReplace2Check chokeaChoke plunger may be partially openedReadjust3Check carburetor adapteraAir enters through crackReplace4Check air screw positionaInadequate fuelair mixtureAdjust according to specifications (refer to TECHNICAL DATA 10)5Check ignition system trigger coil air gapaAir gap is too largeAdjust according to specifications (refer to TECHNICAL DATA 10)6Check dimension of pilot jetaInadequate fuelair mixtureAdjust according to specifications (refer to TECHNICAL DATA 10)7Perform engine leak testaLeaking gaskets allow air to enter in engineReplace defective parts