TORQUE CHARTS
Standard Torque Values
Nominal Designation of Screw
Thread
Standard Tightening Torque
M5
3.5 ± 0.5 N·m
2.6 ± 0.4 lb-ft
M6
6.0 ± 1.0 N·m
4.4 ± 0.6 lb-ft
M8
15 ± 2.0 N·m
11 ± 1.5 lb-ft
M10
30 ± 2.0 N·m
22 ± 1.5 lb-ft
M12
45 ± 2.0 N·m
33 ± 1.5 lb-ft
Torque Specifications
Item
Size
Torque
Nut for U-Bolt of Gimbal
Ring
M10 x 1.5
50 ± 5 N·m
37 ± 4 lb-ft
Bolt for Anode of Cylin-
der Part
10-32 UNF
3.5 ± 0.5 N·m
2.6 ± 0.4 lb-ft
Bolt for Rear Cover
M8 x 1.25
6.0 ± 1.0 N·m
4.4 ± 0.7 lb-ft
Plug
M10 x 1.5
15 ± 2.0 N·m
11 ± 1.5 lb-ft
Bolt for Valve Assembly
M12 x 1.25
6.0 ± 1.0 N·m
4.4 ± 0.7 lb-ft
Bolt for Rear of Inner Pro-
peller Shaft
1 - 14 UNS
80 ± 5.0 N·m
59 ± 3.7 lb-ft
Bolt for Rear of Outer
Propeller Shaft
2-1/8 – 16 UNS
135 ± 5.0 N·m
100 ± 3.7 lb-ft
MAINTENANCE
ZT350 Operation Manual
35
© 2008 Yanmar Marine International
