TIGHTENING TORQUES
2-15
E
SPEC
TIGHTENING TORQUES
SPECIFIED TORQUES
* As for the connecting rod, tighten the bolts to the specified torque at first, and then apply
additional tightening torque specified by angle.
Part to be tightened
Part
name
Thread
size
Q’ty
Tightening torques
Remarks
Nm
m
•
kgf
ft
•
lb
POWER UNIT
Power unit mounting
Bolt
M8
8
21
2.1
15
Flywheel
Nut
M20
1
157
16.0
116
Carburetor unit assembly
Bolt
M6
6
8
0.8
5.9
Oil filter
—
—
1
17.5
1.8
13
Oil filter plug
—
—
1
40
4.0
30
Spark plug
—
M12
3
17.2
1.7
13
Driven sprocket
Bolt
M10
1
38
3.8
28
Cylinder head
1st
Bolt
M9
8
22.6
2.3
17
2nd
46.1
4.6
34
1st
Bolt
M6
4
6
0.6
4.4
2nd
11.8
1.2
8.7
Rocker arm shaft
Bolt
M8
4
18
1.8
13
Tappet adjusting screw
locknut
Nut
M6
6
13.5
1.4
10
Exhaust cover
1st
Bolt
M6
8
6
0.6
4.4
2nd
12
1.2
8.9
Crankcase
1st
Bolt
M6
8
6
0.6
4.4
2nd
12
1.2
8.9
1st
Bolt
M8
8
15
1.5
11
2nd
30
3.0
22
Connecting rod
1st
Bolt
M6
6
8.4
0.8
6.2
2nd
40°
LOWER
Propeller
Nut
M16
1
39
3.9
29
Lower unit mounting
Bolt
M10
4
39
3.9
29
Propeller shaft housing
Bolt
M8
2
16
1.6
12
Pinion nut
Nut
M12
1
73.5
7.4
54
Water inlet
Bolt
M6
1
5
0.5
3.6
BRACKET
Tiller handle mounting
Nut
M10
2
37
3.7
27
Steering bracket
Nut
M10
2
36
3.6
27
Steering friction
mounting
Bolt
—
2
3.9
0.4
2.9
Tiller handle pivot
Bolt
M12
1
37
3.7
27
Rubber mount, upper
Nut
M8
2
23.6
2.4
17
E
572
LT
572
LT
572
LT
*
572
LT
242
LT
Summary of Contents for F40BMHD
Page 126: ...GENERAL 3 25 E CHK ADJ LUBRICATION POINTS Apply Water resistant grease ...
Page 128: ...CHK ADJ 3 26 GENERAL E ...
Page 129: ...3 26 CHK ADJ F D ES ...
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Page 537: ...Printed on recycled paper Printed in Japan Sep 1999 1 7 1 F40B YAMAHA MOTOR CO LTD ...