Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 234Get this manual

Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 234

LOWER CASING CAP ASS'Y
Lower casing cap inspection 1Clean: 9Lower casing cap Use soft brush and solvent2Inspect: 9Lower casing cap CrackDamage Replace

Lower casing cap assembly 1Install: 9Oil seals

Use the special tools to install the oil seals (one by one) until stopping the bottom
Driver rod 1: YB-0622990890-06652 Needle bearing attachment 2: YB-0623090890-06649 2Install: