Bombardier SeaDoo 1996 factory shop manual, Page 164Get this manual
Section 08 ELECTRICAL SYSTEM Sub-Section 02 (IGNITION SYSTEM)
The timing mark refer to the physical component position when the spark must occurThe DC-CDI module must be synchronized with the markFor instance, on particular engine, the timing correction may need to be advanced to so that the mark aligns with timing mark pointer toolThis is not the real spark advance, just correction for the tolerances of the mechanical componentsKnowing that, you select with the programmer the higher or lower number to advance or retard the actual timing correction by referring to the following chartTIMING CORRECTION CHART Programmer number (MPEM) Ignition Timing Correction -1 -2 -3 -4