2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 339Get this manual

COOLING SYSTEM
INSP ADJ

18.Bleed the air from the cooling system19.Inspect: Cooling system Decrease of pressure (leaks) Repair as required

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