1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 153Get this manual
[POWR!+!I:! 1st
CYLINDER HEAD AND Oil PUMP
EXPLODED DIAGRAM
22 .6 Nm (2.3 kg, 16.7 ft Ib)
2nd 46.1 Nm (4.7 kg, 34.0 ft Ib) 95 mm (6)
6.0 Nm (0.6 kg, 4.4 ft Ib)
2nd 11.8 Nm (1 .2 kg8.7 ft .Ib) 25 mm (3)