1999 Ski-Doo Factory Shop Manual Volume One, Page 159Get this manual
Subsection 09
Section 04 ENGINE (CARBURETOR AND FUEL PUMP)
Carburetor body and jets should be cleaned in carburetor cleaner following manufacturer's instructions
2,3, E-Clip and Needle
Remove screws from needle retaining plate to withdraw the needleThe position of the needle in the throttle slide is adjustable by means of an E-clip inserted into of grooves located on the upper part of the needlePosition (at top) is the leanest, (at bottom) the richestNOTE: The last digit of the needle identification number gives the recommended position of the E-clip from the top of the needleExample: Needle identification 6DH4-3 Recommended position of the E-clip from top
;16, Filter
WARNING
Solvent with low flash point such as gasoline, naphtha, benzol, etc should not be used as they are flammable and explosive
Check for clogged filterClean or replace as requiredCheck inlet needle tip conditionIf worn, the inlet needle and seat must be replaced as matched setNOTE: Install needle valve for snowmobile carburetor onlyIt is designed to operate with fuel pump systemCheck throttle slide for wearReplace as necessaryCheck idle speed screw straightnessReplace as necessaryCheck for fuel soaked into float no12Replace as necessaryCheck float for cracks or other damages affecting free movementReplace as necessary