Tightening Torques - Stihl MS 290 Manual

3.5

Tightening Torques

DG screws are used in polymer and light metal 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
Screw
Collar screw
Collar screw
Screw
Screw
Screw
Screw
Screw
Slotted screw
Screw
Screw
Screw
Screw
Carrier
Screw
Screw
Screw
Locknut
Nut
Nut
Spark plug
Screw
Screw
Remarks:
1) Loctite 243, medium strength
2) with sleeve
6
Thread size For component
DG4x15 Cover, chain tensioner/engine housing
DG8x24 Guide bar
M10x21 Collar screw for guide bar/engine pan
DG4x15 Chain brake cover/engine housing
DG4x15 Handle housing/handle molding
DG5x24 Handlebar/handle housing
DG5x24 Hand guard, left
DG4x15 Shroud/engine housing
M5 Box filter/carburetor
DG5x16 Chain catcher/engine housing
DG5x16 Spiked bumper/engine housing
DG5x24 Fan housing/engine housing
DG4x15 Ground connection to cylinder
M12x1L Carrier/crankshaft
DG6x52 Engine housing/cylinder
DG5x24 Annular buffer/handlebar
DG5x24 Annular buffer/engine housing
M5 Muffler cover/cylinder/screw
M8x1 Flywheel/crankshaft
M5 Carburetor/handle housing/screw
M14x1.25 Spark plug
DG5x24 Ignition module/engine housing
DG4x15 Oil pump
Torque Remarks
kpm Nm
0.25 2.5
1.6 16.0
3.0 30.0 1)
0.25 2.5
0.16 1.6
0.35 3.5
0.35 3.5 2)
0.25 2.5
0.2 2.0
0.35 3.5
0.35 3.5
0.35 3.5
0.4 4.0
5.0 50.0
1.1 11.0
0.35 3.5
0.35 3.5
0.8 8.0
2.8 28.0
0.33 3.3
2.5 25.0
0.48 4.8
0.4 4.0
MS 290, MS 310, MS 390