1984 Ski-Doo Shop Manual, Page 67Get this manual
SECTION 02 ENGINE SUB-SECTION 03 (377 TYPE)
CLEANING
Clean all metal components in non-ferrous metal cleaner
DISASSEMBLY AND ASSEMBLY
21, Fan nut
To remove or install fan pulley retaining nut, lock fan pu lley with special holder wrench PIN 420876357At assembly, torque nut to 65 N-m (48 ft-Ibs)
Holder rench
PI 420 876 357