Tightening Fasteners
Use the correct amount of torque when you tighten fasteners. Applying excessive torque may
damage the fastener or component and not enough torque may cause a leak or component
failure.
NOTICE: The tightening torque in the Standard Torque Chart should be applied only
to the bolts with a “7” head (JIS strength classification: 7T). Apply 60%
torque to bolts that are not listed. Apply 80% torque when tightened to
aluminum alloy.
Bolt diameter x pitch
(mm)
M6 x 1.0
M8 x 1.25
M10 x 1.5
M12 x 1.75
M14 x 1.5
M16 x 1.5
Tightening
Torque
N·m
11.0 ± 1.0
26.0 ± 3.0
50.0 ± 5.0
90.0 ± 10.0
140.0 ± 10.0
230.0 ± 10.0
kgf-m
1.1 ± 0.1
2.7 ± 0.3
5.1 ± 0.5
9.2 ± 1.0
14.3 ± 1.0
23.5 ± 1.0
lb-ft
–
19.0 ± 2.1
37 ± 3.6
66.0 ± 7.2
103 ± 7.2
170 ± 7.2
lb-in.
96 ± 9.0
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PERIODIC MAINTENANCE
6LPA Series Operation Manual
51
© 2007 Yanmar Marine International