2000-2005 Yamaha F40B Outboard Service Manual, Page 236Get this manual

CYLINDER HEAD
REPLACING THE VALVE GUIDE
Replacement steps

Heat the cylinder head in an oven to 200C (392 OF) to ease guide removal and installation and to maintain the correct interference fit(1) Remove the valve guide using the valve guide remover

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