Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 324Get this manual

WATER PUMP CHECKING THE WATER PUMP HOUSING, CARTRIDGE INSERT AND IMPELLER
1Check: Water pump housing Cartridge insert Cracksdamage Replace2Check: Impeller Cracksdamagewear Check: Woodruff key Damagewear

Replace
CHECKING THE WOODRUFF KEY
Replace
INSTALLING THE CARTRIDGE INSERT AND WATER PUMP HOUSING
1Install: Water pump housing Cartridge insert 2

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