Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 332Get this manual
PROPELLER SHAFT HOUSING AND PROPELLER SHAFT CHECKING THE DOG CLUTCH
Check: Clutch dog Weardamage Replace
CHECKING THE PROPELLER SHAFT
Check: Propeller shaft Weardamage Replace
ASSEMBLING THE PROPELLER SHAFT ASSEMBLY
1Install: Clutch dog