Yamaha 115-225 HP Outboards Service Manual, Page 121Get this manual
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_ 115, 130 Cylinder head cover: 1st: 4.0 Nm (0.4 m.kg, 2.9 tt.lb) 2nd: B.O Nm (O.B m.kg, 5.B ttlb)
Exhaust cover: 1st: 4.0 Nm (0.4 m.kg, 2.9 tt.lb) 2nd: B.O Nm (O.B m.kg, 5.8 tt.lb)