Bombardier SeaDoo 1998 factory shop manual, Page 116Get this manual
Section 04 ENGINE Subsection 06 (BOTTOM END)
To accurately check if crankshaft is twisted on center main journal, proceed as follows: Remove magneto housing cover Remove flywheel nut (and magneto rotor for the 787 and 947 engines)Refer to MAGNETO SYSTEM 04-04 for procedures Install Bombardier degree wheel (PN 295 000 007) on crankshaft endHand-tighten nut only Remove both spark plugs Install TDC gauge in spark plug hole on MAG side Bring MAG piston at Top Dead Center As needle pointer, secure wire with cover screw and washer Rotate degree wheel (NOT crankshaft) so that needle pointer reads 360
Crankshaft Alignment at Connecting Rod Journal
Counterweights can also be twisted on connecting rod journal on any or both cylinder(s)F01D1NB
1Connecting rod journal alignment here
Such misalignment may cause crankshaft hard to be manually turnedVerification can be done by measuring deflection each end of crankshaftIf deflection is found greater than specified tolerance, this indicates worn bearing(s), bent andor disaligned crankshaftProceed with the disassembly of the engine