Yamaha F4A - Tightening Torque

2-9
E
SPEC
TIGHTENING TORQUE
TIGHTENING TORQUE
SPECIFIED TORQUE
Part to be tightened
Part Thread
Q’ty
Tightening torque
name size Nm m•kgf ft•lb
POWER UNIT
Oil drain Bolt M8 1 20 2.0 14.5
Spark plug — M14 1 25 2.5 18
Recoil starter Bolt M6 3 8 0.8 5.8
Flywheel rotor ass’y Nut M10 1 44 4.4 32
Carburetor Bolt M6 2 8 0.8 5.8
Intake manifold Bolt M6 2 8 0.8 5.8
Cylinder head cover Bolt M6 4 11 1.1 8.0
Cylinder head 1st
Bolt M8 4
15 1.5 10.8
2nd 30 3.0 22
1st
Bolt M6 1
6.0 0.6 4.3
2nd 12 1.2 8.7
Locknut (rocker arm) Nut M6 2 10 1.0 7.2
Power unit mounting Bolt M6 7 8 0.8 5.8
Thermostat cover Bolt M6 3 8 0.8 5.8
Breather cover Bolt M6 3 8 0.8 5.8
Crankcase 1st
Bolt M8 7
10 1.0 7.2
2nd 22 2.2 16
Connecting rod Bolt M7 2 12 1.2 8.7
Oil splash gear unit Bolt M6 1 8 0.8 5.8
LOWER UNIT
Lower unit mounting 1st
Bolt M6 2
3 0.3 2.17
2nd 8 0.8 5.8
Propeller shaft housing 1st
Bolt M6 2
3 0.3 2.17
2nd 8 0.8 5.8
Anode 1st
Bolt M6 1
3 0.3 2.17
2nd 8 0.8 5.8
BRACKET
Steering handle mounting (pivot) Bolt M8 1 18 1.8 13
Shift lever Bolt M6 1 4.5 0.45 3.25
Swivel bracket 3 1st
Bolt M6 2
3 0.3 2.17
2nd 8 0.8 5.8
Tilt lock plate 1st
Nut M6 2
3 0.3 2.17
2nd 8 0.8 5.8
Clamp bracket Nut M8 1 13 1.3 9.4
Swivel bracket 2 (upper casing) 1st
Bolt M6 6
3 0.3 2.17
2nd 8 0.8 5.8
Water pump housing 1st
Bolt M6 4
3 0.3 2.17
2nd 8 0.8 5.8
ELECTRICAL
Ignitor ass’y Bolt M6 2 8 0.8 5.8