Honda BF35A-BF45A Outboard Motors Shop Manual., Page 407Get this manual
3) Remove the down relief valve:valve springspring guide- steel ball- down relief valve seat- O-ringReplace the O-ring with new one during reassembly4) Remove the upper chamber safety valveRemove O-ring from the upper chamber safety valve and discard itReplace the O-ring with new one during reassembly L "A
131 VALVE SPRING
UPPER CHAMBER SAFETY VALVE
VALVE SEAT
1 Do not reuse5) Remove the internal circlip, and remove the manual valve and seal washerRemove the D-ring and O-ring, and discard themReplace with new ones during reassemblyCheck the sealing washer for damage and wearReplace it if necessary