1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 130Get this manual
TIGHTENING TORQUE Part to be tightened ENGINE: 1st Crankcase 2nd Cylinder head Exhaust cover Spark plug Flywheel Nut 1st 2nd 1st 2nd Bolt Bolt Bolt Bolt Bolt Bolt Bolt Bolt M6 Pl.0 M8 Pl.2 M6 Pl.0 M8 Pl.2 M7 Pl.0 M7 P1.0 M6 Pl.0 M6 Pl.0 11 11 10 10 6.0 15 12 30 8.0 17 6.0 12 28 100 0.6 1.5 1.2 3.0 0.8 1.7 0.6 1.2 2.8 10 4.3 10 8.7 22 5.8 12 4.3 8.7 20 71 Apply oil Part name Thread size Q'ty torque m'kg ft'lb Remarks
UPPERCASE AND GEAR CASE: Upper side mount rubber Lower mount rubber housing Clamp bracket Pinion gear Lower case mounting Propeller Nut Nut Nut Nut Bolt Nut 20 20 13 26 18 17 2.0 2.0 1.3 2.6 1.8 1.7 15 15 8.7 19 13 12