Honda Outboards BF40A/BF50A Service Manual, Page 244Get this manual
HONDA BF3BA-4BA
aDISASSEMBLYASSEMBLY
PISTON ASSEMBLY [131 SPOOL VALVE CAP Replace20 Nm (2.0 kg-m, 14.5 ft-Ib)
[141 CHECK VALVE ASSEMBLV ASSEMBLV: Check the valve for wearand damage(3)
ASSEMBLV: After installation, check for smooth operation
ORING CHECK VALVE SPRING (11) SNAP RING (10)
SPOOL VALVE ASSEMBLV: Check the valve for wearand damage
CYLINDER CAP