Standard Torque Values - Yanmar 4BY2 Operation Manuals

Standard Torque Values

Hexagon Bolts and Nuts
Nominal Diameter
M4
M5
M6
M7
M8
M8 x 1
M10
M10 x 1.25
M12
M12 x 1.5
Hose Clamps
Note: Reuse and retightening is prohibited
for all hose clamps. Always install new hose
clamps.
Size
5mm Hex Head
6mm Hex Head
BY Series Operation Manual
Grade (Lubricated)
8.8 or 8
2.7 N·m (24 in.-lb)
5.5 N·m (48.6 in.-lb)
9.5 N·m (84 in.-lb)
15 N·m (133 in.-lb)
23 N·m (204 in.-lb)
25 N·m (221 in.-lb)
46 N·m (34 ft-lb)
49 N·m (36 ft-lb)
80 N·m (59 ft-lb)
88 N·m (65 ft-lb)
Specification
1.0 - 1.5 N·m (8.9 - 13 in.-lb)
2.5 - 3.5 N·m (22 - 31 in.-lb)
© 2008 Yanmar Marine International
PERIODIC MAINTENANCE
10.9 or 10
3.88 N·m (34.3 in.-lb)
8 N·m (71 in.-lb)
13 N·m (115 in.-lb)
22 N·m (195 in.-lb)
32 N·m (24 ft-lb)
35 N·m (26 ft-lb)
64 N·m (47 ft-lb)
68 N·m (50 ft-lb)
110 N·m (81 ft-lb)
125 N·m (92 ft-lb)
12.9 or 12
4.6 N·m (41 in.-lb)
9.5 N·m (84 in.-lb)
16 N·m (142 in.-lb)
26 N·m (230 in.-lb)
39 N·m (29 ft-lb)
42 N·m (31 ft-lb)
77 N·m (57 ft-lb)
82 N·m (60 ft-lb)
135 N·m (100 ft-lb)
150 N·m (111 ft-lb)
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