Yamaha 115-225 HP Outboards Service Manual, Page 114Get this manual
_ G730050
SMALL END BEARINGS AND PISTON ASSEMBLY
1) Count the small-end bearing needles
Number of needles per piston: 30-pcs
If missing, replace all the needles with new ones
Do not use new and used needles together on small endYB-6106
2) Using the special service tool, install the bearings in the connecting-rod small end, and place washers on both sides of the end with rounded side of each washer looking outward