Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 72Get this manual
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INSP ADJ
Engine oil replacement 1 Remove: 9 Oil level plug 9 Drain plug with washer 9 Gasket 2 Install: 2
9 Gasket 9 Drain plug with washer 2
Drain plug: 20 Nm (2.0 mkg, 14.4