Tightening Torques - Stihl 4141 Series Manual

3.4

Tightening Torques

DG and P (Plastoform) screws are used in polymer and lightmetal components. These screws form a
permanent thread when they are installed for the first time. They can be removed and installed as often as
necessary without impairing the strength of the screwed assembly, providing the specified tightening torque is
observed.
For this reason it is essential to use a torque wrench.
Fastener Thread size For component
Spline screw IS-M5x10
Spline screw IS-M5x16
Spline screw IS-M5x30
Plastoform screw IS-P4x16
Plastoform screw IS-P4x16
Spline screw IS-M5x12
Spline screw IS-M5x60
Spline screw IS-DG5x24
Spline screw IS-M5x16
Spline screw IS-M5x16
Spline screw IS-M5x8
Spline screw IS-M5x30
Spline screw IS-M6x35
Collar screw M6x22
Spline screw IS-M5x16
Spline screw IS-M5x30
Spline screw IS-M5x25
Spline screw IS-M4x8
Plastoform screw P3.5x10.6
Spline screw IS-M5x50
Spline screw IS-M5x10
Nut M8x1
M8
Spline screw IS-M3x8
Spline screw IS-M5x16
Spline screw IS-M5x20
Spline screw IS-M5x22
M10x1
Spline screw IS-M4x16
Series 4141 Powerhead
Heat shield/cylinder
Rewind starter/crankcase
Control handle (bike handle)
Control handle/handle halves
(bike handle)
Control handle/handle halves
(loop handle)
Control handle clamps/drive tube
(loop handle)
Filter housing/carburetor/spacer flange
Gear housing/drive tube
Shroud/rewind starter/crankcase
Shroud/clutch housing/crankcase
Sleeve (setscrew)
Sleeve (tube clamp)
Clamp molding/clamp (bike handle)
Clutch/flywheel
Clutch housing/crankcase
Crankcase
Clampi/loop handle (loop handle)
Diaphragm carrier
Detent spring/slide control
(control handle)
Muffler/cylinder
Guard/crankcase
Flywheel/crankshaft
Starter cup/crankshaft
Guard plate/diaphragm carrier
Tank housing/crankcase
Spacer flange/cylinder
Cylinder/crankcase
Spark plug
Ignition module/cylinder
Torque Remarks
lbf.ft Nm
3 4
3 4
1.5 2 with washer
0.75 1
0.75 1
2.6 3.5
2.6 3.5
6.6 9
3 4
3 4
3 4
4.4 6
3.3 4.5
7.5 10 with washer
4.4 6
7.5 10
3.3 4.5
2.6 3.5
0.8 1.1
5.9 8
3 4
14 19
14 19
1.1 1.5 micro-
encapsulated
4.4 6
4.4 6
6.6 9
11 15
3.7 5
5