Yamaha F15B Service Manual page 25

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Tightening torques
Specified torques
Part to be tightened
Power unit
Crankcase bolt
Cylinder head bolt
Cylinder head cover bolt
Exhaust cover and
thermostat cover bolt
Breather cover bolt
Anode bolt
Anode screw
Connecting rod
Flywheel nut
Oil filter
Union bolt
Valve adjusting screw locknut
Drive sprocket bolt
Driven sprocket nut
Power unit mount bolt
Oil pump mount bolt
Relief valve
Oil pressure switch
Spark plug
Carburetor
Intake manifold bolt
Intake silencer bolt
Drain bolt
Float chamber screw
Lower unit
Lower unit mount bolt
Cooling water inlet cover screw
Drain screw
Check screw
Propeller housing bolt
Pinion nut
Propeller nut
Water pump housing bolt
Engine oil drain bolt
6D45F11
Maintenance specifications/Tightening torques
Thread size
1st
M8
2nd
1st
M6
2nd
1st
M8
2nd
1st
M6
2nd
M6
1st
M6
2nd
M6
M5
1st
M7
2nd
M16
M6
M28
M8
M6
M12
M6
M6
M4
M4
M8
M8
M8
M6
M8
M10
M8
M14
Tightening torques
N·m
kgf·m
15
1.5
30
3.0
6
0.6
12
1.2
15
1.5
30
3.0
6
0.6
12
1.2
8
0.8
6
0.6
12
1.2
8
0.8
5
0.5
2
0.2
10
1.0
21
2.1
110
11
18
1.8
40
4.0
14
1.4
13
1.3
54
5.4
21
2.1
8
0.8
8
0.8
18
1.8
18
1.8
8
0.8
10
1.0
4.5
0.45
2.0
0.2
18
1.8
5
0.5
9
0.9
9
0.9
8
0.8
25
2.5
17
1.7
18
1.8
27
2.7
1
ft·lb
11
22
4.4
2
8.7
11
22
4.4
3
8.7
5.8
4.4
8.7
5.8
4
3.7
1.5
7.2
16
5
81
13
30
10
9.6
6
39
16
5.8
5.8
7
13
13
5.8
7.2
8
3.3
1.5
13
3.7
9
6.6
6.6
5.8
18
12
13
20
2-10

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