2004 Skidoo ZX Series Service Manual, Page 217Get this manual
Section 05 ENGINES (4-TEC) Subsection 01 (TROUBLESHOOTING)
SYMPTOM
LOW OR NO OIL PRESSURE
CONDITION
TestInspection
NORMAL USE 5Check oil orifice(s) on the oil pump suction sideaOil orifice(s) is(are) cloggedClean from contaminationReplace oil and oil filter if necessary (refer to MAINTENANCE or LUBRICATION SYSTEM)6Check oil pump functionaOil pump rotor is out of wear limitReplace oil pump shaft (refer to LUBRICATION SYSTEM)bOil pump seized due to oil leakage andor air inclusionReplace oil pump (refer to LUBRICATION SYSTEM)cGears driving oil pump are broken or otherwise damagedReplace gearsdIncorrect oil being usedUse Bombardier's recommend oil (refer to TECHNICAL DATA)7Check oil pressure regulator valve (spring) functionaValve spring damaged (valve always open)Replace springbValve piston is stuck in oil pump housingRepair valve piston8Check plain bearings in crankcase for heavy wearaPlain bearings out of specification (increased clearance)Replace plain bearings