Bombardier SeaDoo 1997 factory shop manual, Page 158Get this manual
Section 07 ELECTRICAL SYSTEM Sub-Section 02 (IGNITION SYSTEM) -
CAUTION
The relation between the PTO flywheel mark position and crankshaft position may change as the PTO flywheel is screwed on the crankshaftAs an example, when the PTO flywheel is reinstall on the crankshaft, it can slightly turns on the crankshaft when the engine is accelerated, even if it is properly torquedThis is enough to obtain false ignition timing readingAlways verify PTO flywheel mark position before checking ignition timing with an appropriate timing lightF00H0FA
Ignition Coil