1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 55Get this manual
ISPECI POWER UNIT
TIGHTENING TORQUES
TIGHTENING TORQUES
Part to be tightened Thread size Tightening torque Nm 21.0 S.O 15.0 157.0 S.O 17.5 40.0 17.2 140.0 3S.0 22.6 46.1 6.0 11.8 1S.0 13.5 6.0 12.0 6.0 12.0 15.0 30.0 6.0 16.5 157.0 4.4 34.4 36.8 11.1 49.5 4.4 37.0 12.7 4.0 23.6 17.7 18.0 53.9 13.0 kg 2.1 O.S 1.5 16.0 O.S 1.S 4.1 1.7 14.3 3.9 2.3 4.7 0.6 1.2 1.8 1.4 0.6 1.2 0.6 0.6 1.5 3.1 0.6 1.7 16.0 0.4 3.5 3.S 1.1 5.0 0.4
ft Ib 15.5 5.9 11.1 115.S 5.9 12.9 29.5 12.6 103.3 2S.0 16.7 34.0 4.4 8.7 13.3 10.0 4.4 8.9 4.4 8.9 11.1 22.1 4.4 12.2 115.S 3.2 25.3 27.1 8.1 36.5 3.2
Power unit mounting Recoil starter roller Sheave drum Flywheel magneto Carburetor Oil filter cartridge Oil filter cartridge bolt Spark plug Drive pulley Driven pulley Cylinder head Cylinder head cover Rocker arm shaft Tappet adjusting screw Exhaust cover