Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 104Get this manual
CONTROL SYSTEM ADJUSTING THE THROTTLE CONTROL CABLE (F8CW) NOTE:
Before adjusting the throttle control cable, make sure that the shift control cable is properly adjusted 1Check: Throttle control cable Damage ReplaceExcessive slack or the stoppers do not contact each other Adjust2Adjust: Throttle control cable Adjusting steps: (1)Set the remote control lever to the neutral position(2)Loosen the locknut and remove the clip and the cable end from the pulley 3(3)Move the pulley by hand until the stopper portion on the pully contacts the stopper portion on the throttle wire stay 4Then, hold it in this position(4)Turn the cable end so it aligns with the pin on the pulley 3Then, reinstall the cable end onto the pulley 3