2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 354Get this manual
BF80BF9.90 11) Loosen the manual valve by turning it turns or more12) Install the drive joint in the position of the gear pump assembly as shown13) Fill the gear pump chamber with the fresh ATF up to the upper edge of the chamberIf the ATF in the valve body contains air bubbles, remove the air bubbles using an oil bottle or equivalent tool Do not pour ATF into the valve body gear pump chamber quicklyPour the fluid slowly Trapped air in the system causes faulty operationRemove the air bubbles in the fluid securelyDRIVE JOINT