Honda BF50 (5HP), BF5A Outboard Motors Shop Manual 2014, Page 53Get this manual
SF50SF5A PISTON RING
Install all ring with markings facing upBe careful not to interchange the top and second ringAfter installation, be sure the rings rotate freely in the piston groove0 Space the piston ring end gaps 120 apart
SECOND RING OIL RING
TOP (CHROME PLATED) SECOND
BREATHER CHAMBER
6x12mm(2)
BREATHER CHAMBER CAP
BREATHER TUBE ASSEMBLY: Connect to the breather chamber cap and secure with the tube clamp