Honda BF35A-BF45A Outboard Motors Shop Manual., Page 416Get this manual
17)Apply ATF to new O-ring, and install it on the down relief valve seat18)Apply ATF to the down relief valve seat and install it in the valve body as shown noting the direction19) Install the steel ball, spring guide and the valve spring
[3] VALVE SPRING [2] SPRING GUID
[4] UPPER CHAMBER
in the down relief valve seat20)Apply ATF to new O-ring, and install it on the upper chamber safety valve21)Apply ATF to the upper chamber safety valve and install it in the valve body noting the direction shown161 LOWER RELIEF VALVE SEAT