Honda BF35A-BF45A Outboard Motors Shop Manual., Page 425Get this manual
MOTOR INSTALLATION 1) Install the drive joint in the position of the gear pump
assembly as shown
[I] DRIVE JOINT
2) Apply ATF to new O-ring, and install it on the power
trimltilt motor assembly3) Fill the gear pump chamber with the fresh ATF up to the upper edge of the chamberIf ATF in the valve body contains air bubbles, remove the air bubbles using an oil bottle or equivalent tool
[I] OIL FILLER HOLE
Do not pour ATF into the valve body gear pump chamber quicklyPour the fluid slowlyTrapped air in the system causes faulty operationRemove the air bubbles in the fluid completely4) Install the power trimltilt motor assembly on the valve