13 Ignition System; Special Servicing Tools, Servicing Aids; Testing The Ignition System - Stihl BR 800 Service Manual

13 Ignition System

13.1

Special Servicing Tools, Servicing Aids

Locking screw – 4282 890 2700
–
Socket, T27x125 – 0812 542 2104 or equivalent
–
MDG 1 analyzer – 5910 840 0210
–
ZAT 4 ignition system tester – 5910 850 4503
–
ZAT 3 ignition system tester – 5910 850 4520
–
Torque wrench – 5910 890 0302 or equivalent
–
Torque wrench – 5910 890 0312 or equivalent
–
Screwdriver, T27x200 – 5910 890 2415 or equivalent
–
Punch-down tool – 5910 890 4000
–
Puller – 5910 893 0801
–
Setting gauge – 4118 890 6401
–
Socket, 13 mm, long – 5910 893 2804 or equivalent
–
Flat nose side cutting pliers
–
Needle
–
Soft-faced hammer
–
STIHL OH 723 press fluid – 0781 957 9000
–
13.2

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.
36
11
1
2
M8x1
(20 Nm / 177 lbf. in.)
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.
The machine'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.
The engine may start and accelerate during the test.
Touching rotating components can result in serious
injuries.
Do not touch rotating components.
13.2.1 Testing Ignition Spark with ZAT 4 Ignition Tester
N
N
N
10
M10x1 (12 Nm / 106 lbf. in.)
9
8
7
6
3
WARNING
WARNING
Preparations, @ 3.1.
Remove the cover, @ 7.3.
Pull boot (9) off the spark plug.
5
4
D4x20
(4.5 Nm /
40 lbf. in.)
BR 800