Bombardier SeaDoo 1997 factory shop manual, Page 79Get this manual
Section 03 ENGINE Sub-Section 06 (BOTTOM END)
Proceed as follows to check if the gear no18 is properly positioned on the counterbalance shaft: Temporarily install the counterbalance shaft in the crankcase Rotate the counterbalance shaft to align the notch of the gear with the crankcase
12,16, Bearing and Counterbalance Shaft
Prior to installation, place bearings into container filled with oil, previously heated to 75C (167F)This will expand bearings and ease their installation
14,16, Crankshaft and Counterbalance Shaft
Install crankshaft first in crankcaseAfter crankshaft installation, install counterbalance shaftMake sure to properly index crankshaft and counterbalance shaft by aligning marks of gears-
CAUTION
Marks on the crankshaft and counterbalance shaft must be aligned, otherwise engine will vibrates and premature wear will occurF00D0UA