1985 Ski-Doo snowmobile Service Manual, Page 70Get this manual
Sous-section 03
Section 02 MOTEUR (MOTEUR DE TYPE 377)
CLEANING
Clean all metal components in non-ferrrous metal cleaner
OISASSEMBLASSEMBLY
21, Fan nut
To remove or install fan pulley retaining nut, lock fan pulley with special holder wrench PIN 420 876 357 At assembly, torque nut to 65 N-m (48 Ibf-ft)
Holder wrench
PIN 420876357