1999 Ski-Doo Factory Shop Manual Volume Three, Page 132Get this manual
Subsection 05
Section 04 ENGINE (OIL INJECTION SYSTEM)
If not, remove pump assembly and check the pump gear and drive shaft (if applicable) for defects, replace as necessaryTest pump as describes belowNOTE: Through normal use, oil level must not drop in small tubesIf oil drops, verify check valve operation in injection nozzleReplace as necessaryTest Bench Connect hose filled with injection oil to main line fittingInsert other hose end in an injection oil containerUsing clockwise rotating drill rotate pump shaftOil must drip from outer fittings while holding lever in fully open positionIf not replace pump2 1