Spark Plug Boot - Stihl TS 420 Manual

1
2 3 4
While using the ZAT 3, hold it only
by the handle (4) or position it in
a safe place. Keep fingers or other
parts of your body at least 1 cm
away from the spark window (3),
high-voltage connection (2), ground
connection (5) and the ground
terminal (1).
Danger!
High voltage – risk of electrocution.
– Crank the engine quickly with the
rewind starter and check
sparkover in the window (3) of the
ignition system tester.
The engine may start and
accelerate during the test.
If a spark is visible, the ignition
system is in order.
If no spark is visible in the
window (3), check the ignition
system with the aid of the
troubleshooting chart, b 8.7.
54
8.4

Spark plug boot

– Remove the shroud, b 7.4.
5
– Remove the ignition module,
b 8.1.1.
: Pull the cap off the spark plug
boot.
: Use suitable pliers to pull the
torsion spring out of the spark
plug boot.
– Unhook the torsion spring from
the ignition lead.
– Pull the boot off the ignition lead.
– Use a pointed tool to pierce the
center of the lead's insulation
about 15 mm from the end of the
ignition lead.
: Pinch the hook of the torsion
spring into the center of the
ignition lead (arrow).
– Coat the inside of the spark plug
boot with Press Fluid, b 14.
: Push the ignition lead and torsion
spring into the spark plug boot.
TS 410, TS 420