1989 Ski-Doo Repair Manual, Page 67Get this manual
Section 02 ENGINE Sub-section 02 (253 ENGINE TYPE)
1Fan housing
2Snap ring
3Shim (2) 4Bearing 6203 (2) 5Fan shaft 6Woodruff keV 7Spacer 8Pullev half 9Shim 0.5 mm 10Fan 11Lock washer 16 mm 12Nut M16
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V-belt Lock washer mm (4) Screw M6 30 (4) Fan cover Cvlinder cowl Taprite screw M16 16 Rubber washer (4) Cowl cover (4) Lock washer mm (4) 22Screw M6 12 (3) 23Screw M6 16
NOTE: The following procedures can be done without removing the engine from chassis
-CLEANING
Clean all metal components in non-ferrous metal cleanerAOOO 002007