Special Tightening Torque; Fuel System; Power Unit - Yamaha F50D Servise Manual

Lower unit technical data / Bracket unit technical data / Special tightening torque

Special tightening torque

Fuel system

Part to be tightened
Fuel filter nut
Fuel filter cup
Fuel pump screw
Fuel pump valve screw
Acceleration pump screw
Prime Start bracket screw
Prime Start body screw
Float chamber screw
Drain screw
Cover screw
Float pin screw

Power unit

Part to be tightened
Spark plug
Starter motor mounting bolt
Starter motor positive terminal nut
Engine oil drain bolt
Oil filter
Union bolt
Pulser coil screw
Flywheel magnet nut
Base assembly bolt
Cover screw
Starter relay terminal nut
Oil pressure switch
Oil pressure switch terminal screw
Mounting bolt
Driven sprocket bolt
Drive sprocket nut
Tensioner bolt
Tensioner bolt (adjusting bolt)
Exhaust cover bolt
Cylinder head bolt
Cylinder head bolt
Valve adjusting locknut
Thread size
—
—
M5
M3
M5
M4
M4
M4
—
M4
M4
Thread size
—
M8
—
—
UNF
—
M5
—
M6
—
—
—
M4
M8
M10
—
—
M8
1st
M6
2nd
1st
M9
2nd
1st
M6
2nd
—
Tightening torques
N·m kgf·m
18 1.8
2.5 0.3
2 0.2
0.5 0.1
3 0.3
2 0.2
2 0.2
2 0.2
3 0.3
2 0.2
2 0.2
Tightening torques
N·m kgf·m
18 1.8
30 3
7 0.7
18 1.8
18 1.8
40 4.0
4 0.4
157 15.7 115.8
4 0.4
3 0.3
3.4 0.3
8 0.8
2 0.2
21 2.1
38 3.8
150 15 110.6
8 0.8
25 2.5
6 0.6
12 1.2
23 2.3
47 4.7
6 0.6
12 1.2
13.5 1.4
0
ft·lb
13.3
1.8
1
1.5
0.4
2.2
1.5
2
1.5
1.5
2.2
3
1.5
1.5
4
ft·lb
13.3
5
22.1
5.2
13.3
6
13.3
29.5
3.0
7
3.0
2.2
2.5
8
5.9
1.5
15.5
9
28.0
5.9
18.4
10
4.4
8.9
17.0
34.7
4.4
8.9
A
10.0
1-14