Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 146Get this manual
POWR EXPLODED DIAGRAM
CYLINDER HEAD AND PUSH ROD
CYLINDER HEAD AND PUSH ROD4
M6 12 mm 11 Nm (1.1 mkg, 8.0 ftlb) M8 40 mm 1st 15 Nm (1.5 mkg, 10.8 ftlb) 2nd 30 Nm (3.0 mkg, 22 ftlb) 11
6 M8 60 mm 10 1