Yamaha Outboards 3P Service Manual, Page 47Get this manual
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ASSEMBLY AND ADJUSTMENT
G7500 1-0'
CYLINDER HEAD 1) Install the gaskets, cylinder-head cover and cylinder head2) Tighten the bolts in sequence and in two steps of torque1st step: Nm (0.3 m.kg, 2.2 ft.lb) 2nd step: 6-9.5 Nm (0.60.95 kg, 4.36.9 ft .Ib) 3) Install the thermostat, gasket and cover