Honda BF9.9A-BF15A Outboard Motors Shop Manual., Page 83Get this manual
HONDA BF9.9A-BF15A
PISTON RING WIDTH
Standard Service limit
a PISTON NG SIDE CLEARANCE
0.055-0.1 40 mm (0.0021 7-0.0055 in)
0.2 mm (0.0079 in)
PISTON RING END GAP
Standard Service limit
0 15-0.30 mm (0.0059-0.0118in) 0.35-0.50 mm (0.01 38-0.0197 in) 0.2-0.8 mm (O.OO79-O.O3l5in)