Stihl MS 240

7MS 240, MS 260, MS 260 C
3.5 Tightening Torquese
DG and P (Plastoform) 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 Thread size For component Torque
Nm
Letter
Countersunk screw P 4x12 Cover plate/sprocket cover (quick chain
tensioner)
2.5
Screw M 4x8 Cover plate/chain tensioner 3.0 4)
Collar screw M 8x21.5 Bar mounting 23.0 1)
Collar screw M10/M 8 Bar mounting/quick chain tensioner 30.0 1)
Screw M 4x12 Cover, chain brake/crankcase 3.0 4)
M 10x1 Decompression valve (MS 260) 14.0
Screw B 4.9x9.5 Spark arresting screen/muffler 2.0
Screw M 3.5x12 Generator/crankcase 2.0 1)
Screw P 6x32.5 Handlebar, top (polymer)/tank housing 5.0
Screw P 6x21.5 Handlebar, bottom (polymer)/tank housing 5.0
Screw P 6x19 Handlebar, top and bottom/tank housing
(version with handle heating)
7.0
Screw P 4x19 Handle molding 1.6
Screw M 5x12 Retaining plate/annular buffer 8.0 4)
Screw M 4x16 Hand guard/crankcase (micro-encapsulated) 4.0 4)
Nut M 5 Slotted nut, shroud/stud, cylinder 3.5
Screw P 6x19 Chain catcher/plug 2.8
Screw M 5x12 Spiked bumper
(with self-locking nut) 7.5
4)
Screw M 5x20 Crankcase 9.0
Collar nut M 5 Air filter/tank housing 2.0
Screw M 4x16 Fan housing 4.0 4)
M 12x1L Carrier (clutch) 50.0
Screw M 4x12 Oil pump/crankcase 3.0 4)
Screw P 6x26.5 Annular buffer, tank housing/crankcase
(ignition side)
5.0
Screw M 5x12 Annular buffer plate/crankcase (ignition side) 8.0 4)
Screw P 6x19 Annular buffer, tank housing/crankcase
(clutch side)
5.5
Screw M 5x16 Muffler/crankcase/cylinder
(version with catalytic converter and MS 260)
10.0 1), 4)