1983 Yamaha 30EN Outboards Service Manual, Page 166Get this manual
TIGHTENING TORQUE Part to be tightened ENGINE: Reed valve Crankcase Cylinder head 1st 2nd 1st 2nd 1st Exhaust cover 2nd 1st 2nd Flywheel Power unit Spark plug UPPERCASE AND GEAR CASESwivel bracket Upper side mount rubber Upper side mount rubber Upper front mount rubber Upper front mount rubber Pinion nut Ring nut Bolt Nut Nut Bolt Nut Nut Nut Ml0xPl .25 Ml0xPl.25 Pl.0 Ml0xPl .25 23 20 20 11 20 35 90 2.3 2.0 2.0 1.1 2.0 3.5 .0 17 14 14 14 25 65 Inner Outer Part name Thread size Q'ty Tightening torque Nm 15 27 15 27 160 18 20 m'kg 0.5 1.5 2.7 1.5 2.7 0.4 0.9 0.4 .9 16 1.8 2.0 ft-lb 3.6 10 19 10 19 2.9 6.5 2.9 6.5 115 13 14 30A 25D Remarks
Bolt, nut Bolt Bolt Bolt Bolt Nut Bolt
M Pl.0 Pl .25 P1.25 PLO Pl .0