2003 Ski-Doo ZX Series Factory Shop Manual, Page 161Get this manual

Section 04 ENGINE Subsection 07 (AXIAL FAN COOLING SYSTEM)
AXIAL FAN COOLING SYSTEM
377, 503 and 552 Engines

7 Nm (62 lbfin)

13 Nm (115 lbfin)

2 Nm (18 lbfin)

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives