1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 67Get this manual

1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 67

Tightening order and tightening torque: Tightening torque: 1st step Nm (0.8 mkg, 5.8 ftlb) 2nd step 17 Nm (17 kg, 12 ftlb)
1Cylinder body 3Exhaust inner cover