2004 Skidoo ZX Series Service Manual, Page 150Get this manual
Section 04 ENGINES (2-STROKE) Subsection 03 (ENGINE LEAK TEST AND MEASUREMENT)
ENGINE LEAK TEST AND MEASUREMENT
LEAK TEST
The following gives verification procedures for liquid cooled engines though it also applies to fan cooled enginesFor FC engines, do not consider information pertaining to coolant system and pump shaft oil gear reservoirOn FC twin-cylinder engines, each cylinder cannot be verified individually due to leakage from one cylinder to the other through labyrinth sleeve in center of crankshaftCAUTION: Using hydrocarbon lubricant (such as engine oil) will damage rubber seal of pump piston
PREPARATION
Remove tuned pipe Install plug over exhaust manifold Remove carburetorsthrottle body assembly (as applicable) Unplug fuel inlet line from fuel rail Insert plugs in intake rubber bootsTighten with existing clamps
A32C1FA
Activate pump and pressurize engine to 34 kPa (5 PSI)Do not exceed this pressure Engine must stand this pressure during minutesIf pressure drops before minutes, check tester kit by spraying soapy solution on pump cylinder, all plugs and fittings If tester kit is leaking, bubbles will indicate where leak comes from If tester kit is not leaking, check engine as per following procedure