Stihl 4180 Series User Manual

6 Series 4180 Powerhead
Fastener Thread size For component Torque
Socket head screw IS-DG5x24 Starter cover/tank/engine pan 6.0
Nut M8x1 Starter cup/crankshaft 17.0
Socket head screw IS-M5x30 Valve cover/cylinder 3.5
Screw plug M11x10 Screw plug/gearbox 10.0
Spark plug IS-M10x1 Spark plug 9.0
Socket head screw IS-DG4x18 Ignition module/cylinder 4.5
Socket head screw IS-DG5x32 Spacer flange/cylinder 9.0
Socket head screw IS-P5x14 Fan housing/clutch drum bearing 4.0
6)
Remarks:
1)
Version with bike handle
2)
Version with loop handle
3)
KombiEngine
4)
FS 100 RX
5)
Degrease crankshaft/flywheel and mount oil-free
6)
FS 90, 100; KM 90, 100; FC 90, 95, 100
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.
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.
Coat micro-encapsulated screws with medium strength Loctite 243 before reinstalling.

Stihl 4180 Series Specifications

General

Brand	Stihl
Model	4180 Series
Category	Engine
Language	English