Specified Tightening Torque; Fuel System; Power Unit - Yamaha F4B Service Manual

Power unit technical data / Lower unit technical data / Specified tightening torque

Specified tightening torque

Fuel system

Part to be tightened
Choke cable nut
Choke holder bolt
Fuel cock screw
Intake manifold bolt
Throttle cable locknut
Throttle link screw
Fuel pump valve screw
Fuel pump screw
Fuel pump bolt

Power unit

Part to be tightened
CDI unit bolt
Valve adjusting locknut
Drive plate screw
Start-in-gear protection cable locknut
Flywheel magnet nut
Engine shut-off switch nut
Power unit mounting bolt
Crankcase bolt
Blind plug
Pivot bolt
Cylinder head bolt
Thermostat cover anode screw
Spark plug
Connecting rod cap bolt
Breather plate screw
Lower unit
Part to be tightened
Drain screw
Flushing screw
Lower case mounting bolt (S-transom model)
Lower case mounting bolt (L-transom model)
Shift joint bolt
Check screw
Screw size
—
M5
M6
M6
—
M4
M3
M4
M6
Screw size
M6
—
—
—
—
—
M6
1st
M6
2nd
M8
—
1st
M8
2nd
M5
—
1st
M7
2nd
M5
Screw size
—
—
M6
M6
M6
—
Specified tightening torque
Tightening torques
N·m kgf·m
4 0.4
4 0.4
7 0.7
12 1.2
4 0.4
1.5 0.15
0.5 0.05
2 0.2
7 0.7
Tightening torques
N·m kgf·m
10 1.0
10 1.0
7 0.7
2 0.2
60 6.0
2 0.2
12 1.2
5 0.5
11 1.1
20 2.0
10 1.0
13 1.3
28 2.8
2 0.2
13 1.3
6 0.6
12 1.2
8 0.8
Tightening torques
N·m kgf·m
9 0.9
9 0.9
11 1.1
15 1.5
16 1.6
9 0.9
0
ft·lb
3.0
3.0
5.2
1
8.9
3.0
1.11
2
0.37
1.5
5.2
3
ft·lb
7.4
4
7.4
5.2
1.5
5
44.3
1.5
8.9
3.7
6
8.1
14.8
7.4
9.6
7
20.7
1.5
9.6
8
4.4
8.9
5.9
9
ft·lb
10
6.6
6.6
8.1
11.1
11.8
6.6
A
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