Honda Outboards BF40A/BF50A Service Manual, Page 123Get this manual
HONDA BF3I5A45A
PISTONDISASSEMBLYIREASSEMBLY
NOTE After installing pistons and connecting rods in the cylinder block, secure the rods to the crankshaft
TOP RING REASSEMBLY: Chrome platedDo not interchange with SECOND RING
[9) SECOND RING
[8J OIL RING
REASSEMBLY: Space the side rail end gaps at least 20 mm (0.8 in) apartCoat the oil ring with oil after assembly
[2J PISTON RING
J-REASSEMBLY:
Install the rings with the markings facing up Stagger the ring end gaps 1200 apartDo not align with the piston pin or thrust sidesINSPECTION: P10-10