7.3.2 Spark plug – Removal
Preconditions
☑
Engine is stopped and starting disabled.
☑
Open protective packing of new spark plug only immediately prior to installation.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Special wrench, 20.8 mm
F30452574
1
DANGER
Live components, flash-over.
Risk of serious injury - danger to life!
• Always wear electrical gloves (class 4 minimum) when touching the ignition cable in operation.
WARNING
Hot components/surfaces.
Risk of burns!
• Allow the engine to cool down to below 50 °C before beginning work.
• Wear suitable protective equipment/thermal gloves.
• Avoid unprotected contact with hot surfaces.
WARNING
Compressed air gun ejects a jet of pressurized air.
Risk of injury to eyes and damage to hearing, risk of rupturing internal organs!
• Never direct air jet at people.
• Always wear safety goggles/face mask and ear defenders.
Spark plug – Removal
1.
Remove ignition cable (2) from ignition coil.
2.
Remove screws (5) and tab washer (4) from
cylinder head cover (1).
3.
Remove spark plug connector (3) with igni-
tion cable (2) from spark plug.
4.
Release spark plug and unscrew a few thread
turns.
5.
Clean spark-plug recess with compressed air.
6.
Unscrew spark plug from cylinder head.
7.
Remove lower seal of ignition cable.
146 | Ignition System | MS150034/04E 2016-11
TIM-ID: 0000042138 - 002