Honda BF35A-BF45A Outboard Motors Shop Manual., Page 410Get this manual
10) Remove the 2-way valve Remove the O-ring from the 2-way valve and discard itReplace the O-ring with new one during reassembly
not reuse
[2] 2-WAY VALVE
bINSPECTION
Check the down relief valve seat, spring guide, steel bail and spring for wear and damageReplace the down relief valve seat, spring guide or spring if damaged or worn[I SPRING GUIDE-
DOWN RELIEF VALVE
121 SPRING
[3] UPPER CHAMBER SAF7VALVE
UPPER CHAMBER SAFETY VALVE
Check the upper chamber safety valve for wear and damageReplace the upper chamber safety valve if damaged or worn