Yamaha F40BWHD - Specified Torques; Tightening Torques

TIGHTENING TORQUES
2-15
E
SPEC
TIGHTENING TORQUES
SPECIFIED TORQUES
* As for the connecting rod, tighten the bolts to the specified torque at first, and then apply
additional tightening torque specified by angle.
Part to be tightened
Part
name
Thread
size
Q’ty
Tightening torques
Remarks
Nm m
•
kgf ft
•
lb
POWER UNIT
Power unit mounting Bolt M8 8 21 2.1 15
Flywheel Nut M20 1 157 16.0 116
Carburetor unit assembly Bolt M6 6 8 0.8 5.9
Oil filter — — 1 17.5 1.8 13
Oil filter plug — — 1 40 4.0 30
Spark plug — M12 3 17.2 1.7 13
Driven sprocket Bolt M10 1 38 3.8 28
Cylinder head
1st
Bolt M9 8
22.6 2.3 17
2nd 46.1 4.6 34
1st
Bolt M6 4
6 0.6 4.4
2nd 11.8 1.2 8.7
Rocker arm shaft Bolt M8 4 18 1.8 13
Tappet adjusting screw
locknut
Nut M6 6 13.5 1.4 10
Exhaust cover
1st
Bolt M6 8
6 0.6 4.4
2nd 12 1.2 8.9
Crankcase
1st
Bolt M6 8
6 0.6 4.4
2nd 12 1.2 8.9
1st
Bolt M8 8
15 1.5 11
2nd 30 3.0 22
Connecting rod
1st
Bolt M6 6
8.4 0.8 6.2
2nd 40°
LOWER
Propeller Nut M16 1 39 3.9 29
Lower unit mounting Bolt M10 4 39 3.9 29
Propeller shaft housing Bolt M8 2 16 1.6 12
Pinion nut Nut M12 1 73.5 7.4 54
Water inlet Bolt M6 1 5 0.5 3.6
BRACKET
Tiller handle mounting Nut M10 2 37 3.7 27
Steering bracket Nut M10 2 36 3.6 27
Steering friction
mounting
Bolt — 2 3.9 0.4 2.9
Tiller handle pivot Bolt M12 1 37 3.7 27
Rubber mount, upper Nut M8 2 23.6 2.4 17
E
572
LT
572
LT
572
LT
*
572
LT
242
LT