Honda BF50 (5HP), BF5A Outboard Motors Shop Manual 2014, Page 110Get this manual
2CYLINDER HEADNALVES
aDISASSEMBLYREASSEMBLY
VALVE COTTER (intake side onlv)
VALVE ROTATOR (exhaust side on IV) SPRING RETAINER DISASSEMBLY: Slide the retainer sideways to align the large hole with the valve stem
VALVE SPRING RETAINER DISASSEMBLY: Compress the valve spring with your finger and remove the valve cotter and valve spring retainerVALVE SPRING (2)