Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 24Get this manual
GEN INFO
SAFETY WHILE WORKING
3Non-reusable items Always use new gaskets, packings, Orings, split-pins and circlips etcon reassembly
DISASSEMBLY AND ASSEMBLY
1Clean parts with compressed air when disassembling2Oil the contact surfaces of moving parts before assembly