Bombardier SeaDoo 1989 factory shop manual, Page 49Get this manual
Section 03 ENGINE Sub-section 05 (BOTTOM END)
Crankshaft Alignment
A quick check can be made as follows- Insert finger in each connecting rod Lift crankshaft and aoolv rotaltion movement to
Measuring MAG side deflection in crankcase
crankshaft with fingers
Remove crankshaft bearings and check dleflection again on V-shaped blocks as ilustrated
A twisted crankshaft will turn irregularly in an out of round motion