Controller, Ignition Lead; Special Servicing Tools, Servicing Aids; Testing The Ignition System; Removing The Ignition Lead - Stihl MS 500i Service Manual

19 Controller, Ignition Lead

19.1

Special Servicing Tools, Servicing Aids

Open-end wrench, 14 mm
–
Socket, T20x125 – 0812 542 2041 or equivalent
–
MDG 1 analyzer – 5910 840 0210
–
Torque wrench – 5910 890 0302 or equivalent
–
Screwdriver, T20 – 5910 890 2301 or equivalent
–
Cover – 5910 890 3200
–
Punch-down tool – 5910 890 4000
–
Flat nose side cutting pliers
–
Needle
–
Pin punch, 5 mm
–
STIHL OH 723 press fluid – 0781 957 9000
–
19.2

Testing the Ignition System

WARNING
The saw's ignition system generates high voltages.
Touching live components when the rewind starter is
operated can result in serious or fatal injuries. Do not
touch live components while the rewind starter is being
operated.
Do not operate the rewind starter if the spark plug boot
has been removed or the spark plug unscrewed.
32
1
2
M10x1 (14 Nm / 124 lbf. in.)
3
4
5
6
8
7
P4x12 (1.5 Nm / 13 lbf. in.)
WARNING
The saw's ignition system produces sparks. Unconfined
sparks may cause a fire or an explosion in an easily
combustible or explosive environment. This can result in
serious or fatal injuries and damage to property.
Do not operate the rewind starter if the spark plug boot
has been removed or the spark plug unscrewed.
19.2.1 Checking Ignition System with MDG 1 Analyzer
The saw automatically detects that the ignition system is
operating properly. This information can be read out with
the MDG 1 using the STIHL diagnostic software
Connect saw to MDG 1 analyzer.
N
Start STIHL diagnostic software and follow the
N
instructions.
19.3

Removing the Ignition Lead

Preparations, @ 3.1.
N
Remove the filter cover
N
Remove the shroud.
N
Pull boot (2) off the spark plug.
N
Unscrew ignition lead (4) counterclockwise from the
N
ignition module (6).
Remove ignition lead (4).
N
Remove the grommet (5).
N
MS 500i