Tightening Fasteners - Yanmar 6LPA-STP2 Operation Manual

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)
N·m
kgf-m
Tightening
Torque
lb-ft
lb-in.
6LPA Series Operation Manual
M6 x 1.0 M8 x 1.25
11.0 ± 1.0 26.0 ± 3.0
1.1 ± 0.1 2.7 ± 0.3
– 19.0 ± 2.1
96 ± 9.0 –
© 2007 Yanmar Marine International
PERIODIC MAINTENANCE
M10 x 1.5 M12 x 1.75
50.0 ± 5.0 90.0 ± 10.0
5.1 ± 0.5 9.2 ± 1.0
37 ± 3.6 66.0 ± 7.2
– –
M14 x 1.5 M16 x 1.5
140.0 ± 10.0 230.0 ± 10.0
14.3 ± 1.0 23.5 ± 1.0
103 ± 7.2 170 ± 7.2
– –
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