Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 49Get this manual
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 grooveSpace the piston ring end gaps 120' apart
[4] MARKING
161 SECOND RING
(CHROME PLATED)
BREATHER CHAMBER