Spark Plug Boot - Stihl SR 430 Manual

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2
Using the ZAT 3 ignition tester
5910 850 4520
– Before starting the test, install a
new spark plug in the cylinder
and tighten it down firmly.
– Connect spark plug boot to the
terminal (2).
: Attach the ground terminal (1) to
the spark plug.
: Use adjusting knob (3) to set the
spark gap to about 2 mm.
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3 4
2
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).
High voltage – risk of electric shock.
SR 430, SR 450
– Crank the engine quickly with the
rewind starter and check spark in
the tester's window (3).
The engine may start and
accelerate during the test.
If a spark is visible, the ignition
system is in order.
3
If no spark is visible in the
window (3), check the ignition
system with the aid of the
troubleshooting chart, b 5.7
5.4

Spark Plug Boot

The ignition module (1) and ignition
lead (2) form a unit. A new ignition
module must be installed if the
ignition lead is damaged.
– Pull off the spark plug boot
vertically.
– Remove the shroud, b 4.4
5
: Use suitable pliers to pull the leg
spring out of the spark plug boot.
– Unhook the leg spring from the
ignition lead.
– Pull the boot off the ignition lead.
Installing
Do not shorten the ignition lead.
– Use a pointed tool to pierce the
center of the new ignition lead's
insulation, about 15mm from the
end of the lead.
: Pinch the hook of the leg spring
into the pierced hole in the center
of the lead (arrow).
– Coat the inside of the spark plug
boot with STIHL press fluid,
b 13
: Hold the ignition lead and leg
spring together and push them
into the spark plug boot.
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