Specified Torques; Bracket Unit; General Torques - Yamaha FT25B Manual De Servicio

SPEC
TIGHTENING TORQUES

SPECIFIED TORQUES

Part to be tightened
POWER UNIT
Rocker arm retainer
Valve adjusting screw locknut
LOWER UNIT
Propeller
Lower unit mounting
Propeller shaft housing
Pinion nut
Water inlet grill

BRACKET UNIT

Upper mount
Oil pan assembly
Baffle plate
Exhaust manifold
Engine oil drain bolt
Clamp bracket
Grease nipple
Steering arm friction bolt
Nut (A) Bolt (B)
8 mm M5
10 mm M6
12 mm M8
14 mm M10
17 mm M12
TIGHTENING TORQUES
General torque
specifications
Nm m•kgf ft•lb
5.0 0.5 3.6
8.0 0.8 5.8
18 1.8 13
36 3.6 25
43 4.3 31
2090
Thread size
Nm
M8 18
— 14
M16 39
M10 39
M8 16
M10 50
M5 4
M8 24
M8 21
— 5
M6 10
— 17
— 12
— 3
M6 3

GENERAL TORQUES

This chart specifies tightening torques for
standard fasteners with a standard ISO
thread pitch. Tightening torque specifica-
tions for special components or assemblies
are provided in applicable sections of this
manual. To avoid warpage, tighten multi-
fastener assemblies in a crisscross fashion
and progressive stages until the specified
tightening torque is reached. Unless other-
wise specified, tightening torque specifica-
tions require
Components should be at room tempera-
ture.
– 16 –
Tightening torques
m•kgf
1.8
1.4
3.9
3.9
1.6
5.0
0.4
2.4
2.1
0.5
1.0
1.7
1.2
0.3
0.3
clean, dry
E
2
ft•lb
13
10
28
28
12
36
2.9
17
15
3.6
7.2
12
8.7
2.2
2.2
threads.