Bombardier SeaDoo 1990 factory shop manual, Page 96Get this manual
ELECTRICAL Sub-section 02 (IGNITION TIMING)
Section 07
Timing light pick-up on MAG side
Marks a"1gnedFlywheel mark
Fa01 007 021
FOCI7 054
If narks do not align, scribe new one onto flywheel fac ng ignition housing mark This new mark becomes reference when using stroboscopic timing light
2 Connect an induction-type tachometer to spark plug wire Start engine and point timing light straight in line with ignition housing timing mark Bring engine to 6000 RPM for brief instant
CAUTIONTiming mark position verification cannot be used as timing procedure, therefore, always check the timing with stroboscopic timing light 6000 RPM after the marks have been checked
Checking Ignition Timing
NOTETo perform this procedure it IS recommended to use stroboscopic tirning light rated to work to 6000 RPM