Stihl MS 231 Manual page 8

Fastener Thread size For component
Screw P 4x12
Screw P 4x10
M 10x1
Screw D 4x20
Screw D 5.3x41
Remarks:
1) Screws with binding head
2) Micro-encapsulated screws
3) Waxed screws
4) Degrease crankshaft/flywheel and mount oil-free
Q) QuickStop Super
B) Quick chain adjuster
Use the following procedure when refitting a DG or P screw in an existing thread:
Place the screw in the hole and rotate it counterclockwise until it drops down slightly.
Tighten the screw clockwise to the specified torque.
This procedure ensures that the screw engages properly in the existing thread and does not form a new thread
and weaken the assembly.
Coat micro-encapsulated screws with medium strength Loctite 242 or 243 before reinstalling.
Power screwdriver setting for polymer: DG and P screws max. 500 rpm
Do not use an impact wrench for releasing or tightening screws.
Do not mix up screws with and without binding heads.
MS 231, MS 231 C, MS 251, MS 251 C
All manuals and user guides at all-guides.com
Pre-separator / engine housing
Elbow connector / air guide shroud
Spark plug / cylinder
Ignition module/cylinder
Cylinder / engine housing
Torque Remarks
Nm
2.0
1.6
12.0
4.5 1), 3)
11.0
7