2005 Ski-Doo Racing Handbook, Page 176Get this manual
SECTION 05ENGINE PREPARATION
Start the engine and point timing light on timing markBring engine to 3500 RPM for brief instant
A29E0WA
TIMING ADVANCED BY ABOUT 2
A29E0UA
CHANGING TIMING
All Engine Types NOTE: To change the timing on the SDI engines, the VCK is mandatoryThe MPEM programmer cannot be used with these engines
The timing mark must be aligned with pointer endIf such is not the case, note if timing is retarded or advancedENGINE TYPE 593 593 HO, 593 HO SDI, 793 HO TOLERANCE 0.5