Bombardier SeaDoo 2001 factory shop manual, Page 255Get this manual
Subsection 03
Section 06 ENGINE MANAGEMENT (DI) (COMPONENT INSPECTION AND ADJUSTMENT)
Normally TDC setting should not be requiredIt has been set at factory and it should remain correctly set since every part is fixed and not adjustableThe only time the TDC setting might have to be changed would be when replacing the crankshaft, the magneto rotor, the CPS, the encoder wheel or the MPEMIf the TDC setting is found to be incorrect, you should first check for proper crankshaft alignmentThis might be the indication of twisted crankshaftWith this ignition system, the TDC setting can be checked with either the engine hot or coldAlso, the TDC setting is to be checked at any RPM with the timing lightThe TDC setting is best checked at idle speed as it is more accurate and easier than at higher speed, also it will keep the engine temperature lower for longer timeEnsure to properly cool the engine through the flushing fittingNOTE: When checking the TDC setting, the spark advance has to be locked to allow proper verification of the TDC marksSee TDC Setting below