1989 Ski-Doo Repair Manual, Page 47Get this manual
Section 02 ENGINE Sub-section 01 (247 ENG INE TYPE)
Also, prior to crankcase adjoining, install protector sleeve on each crankshaft extension to prevent oil seal damage (See Tool Section)Apply light coat of lithium grease on seal lipSpray some new injection oil on all moving parts of the crankshaftCAUTION: To ensure appropriate crankshaft bearing lubrication, seal outer surface must be pressed on seal crankcase shoulder
3,12,16, Stud or boltnut
Torque the nuts or bolts to 21 N-m (15 Ibf-ft) following illustrated sequencePolyarnid ring pusher (f'120 2169 30) Crankcase half