Yamaha Outboards 3P Service Manual, Page 48Get this manual
ASSEMBLY AND ADJUSTMENTIINSTAlLATION
G76500-0'
EXHAUST MANIFOLD 1) Install the gasket and exhaust manifold to the crankcase, and tighten the bolts in sequence and in two steps of torque
1st step: Nm (0.3 m.kg, 2.2 ft.lb) 2nd step: 6-9.5 Nm (0.6-0.95 m.kg, 4.3-6.9 ft.lb)
G77000-0'