Honda BF15D BF20D Outboard Motors Shop Manual., Page 347Get this manual
bDISASSEMBLY a a
Do not disassemble the gear pump assemblyIf it is faulty, replace it as an assemblyDo not use shop towel, cloth, gloves, etcDo not reuse the drained automatic transmission fluid (ATF)Do not hold at the outer tube when holding the power tilt assembly in vise during operationClean the removed parts in fresh automatic transmission fluid (ATF), and blow each port of the parts with compressed airSet the parts neatly in suitable container with care not to contaminate them with dust and dirtDo not reuse the O-ringsRemove each valve and sleeve with care not to damage the sliding surface of the parts
POWER TILT MOTOR
1) Connect the power tilt motor 2P connector and operate the power tilt motor assembly until the piston rod extends fully2) Loosen the manual valve fully
3) Remove the oil hole cap bolt and drain the ATF in the oil tank through the bolt hole