Stihl MS 261 User Manual page 8

Fastener
Screw
Screw
Screw
Nut
Screw
Collar nut
Collar nut
Collar nut
Screw
Screw
Screw
Screw
Remarks:
1) Loctite 242 or 243, medium strength
2) Loctite 270, high strength
3) Micro-encapsulated screws
4) Screws with binding head
5) Degrease crankshaft/flywheel and mount oil-free
VW) Carburetor and handle heating system
Q) QuickStop Super
BE) Quick chain tensioner/ErgoStart
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 261, MS 261 C
Thread size For component
M 4x12 Oil pump/crankcase
M 5x16 Muffler/crankcase
M 5x16 Muffler / cylinder
M 8x1 Flywheel/crankshaft
M 4x12 Thermostatic switch / carburetor (VW)
M 5 Carburetor / collar screw, 1st stage, fan side
M 5 Carburetor / collar screw, 2nd stage, sprocket
side
M 5 Carburetor / collar screw, 3rd stage, fan side
M 5x16 Preseparator/crankcase
M 14x1.25 Spark plug
M 4x20 Ignition module/crankcase
M 5x20 Cylinder/crankcase, 1st stage
M 5x20 Cylinder/crankcase, 2nd stage
Torque Remarks
Nm
3.0 4)
10.0 3), 4)
10.0 3), 4)
28.0 5)
2.0
2.0
3.5
3.5
3.0 4)
25.0
4.0 3)
4.0 4)
10.0 4)
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