2004 Skidoo ZX Series Service Manual, Page 439Get this manual
Section 09 ELECTRICAL SYSTEM Subsection 01 (IGNITION TIMING)
Start the engine and point timing light on timing markBring engine to 3500 RPM for brief instant
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1Timing mark in line with pointer end
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CHECKING IGNITION TIMING
Use timing lightTo check the ignition timing proceed as follows: Place ski tips against wall, raise rear of vehicle on stand, so that track does not contact the ground
The timing mark must be aligned with pointer endIf such is not the case, note if timing is retarded or advancedENGINE TYPE 593, 693 593 HO SDI, 793 SDI TOLERANCE 0.5