Stihl MS 230 Service Manual

36 MS 210, MS 230, MS 250
To test the ignition module, use
either the ZAT 4 ignition system
tester 5910 850 4503 or the ZAT 3
ignition system tester
5910 850 4520.
The ignition test refers only to a
spark test, not to ignition timing.
Before starting the test, check that
the spark plug is in good condition.
Test the ignition coil only with the
spark plug properly installed in the
cylinder.
: Using the ZAT 4 ignition tester
5910 850 4503:
Pull the boot off the spark plug
and connect it the input
terminal (1). Push the tester’s
output terminal (3) onto the spark
plug.
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321
– Pull the rewind starter and check
the sparkover in the tester’s
window (2).
It is necessary to use the ZAT 3
ignition system tester
5910 850 4520 to test the auxiliary
spark gap.
– Before starting the test, install a
new spark plug in the cylinder
and tighten it down firmly –
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ZAT 3
5910 850 4520
3
2
1
b 3.5.
: Pull the boot off the spark plug
boot and connect it to
terminal (2).
: Attach ground terminal (1)
(alligator clip) to spark plug.
Use adjusting knob (3) to set spark
gap to about 2 mm.
While using the ZAT 3, hold it only
by the handle or position it in a safe
place.
Warning!
High voltage – risk of electrocution.
– Crank engine with rewind starter
(min. 1,000 rpm) and evaluate
spark in spark window.
If a spark is visible, the ignition
system is in order.
If no spark is visible, check the
wiring harness and contact spring –
b 7.4.
If the spark plug, ignition lead and
spark plug boot are in order, use an
ohmmeter to check the short circuit
wire, ground wire and contact spring
for a break.
: Pull the short circuit wire (arrow)
off the tag on the ignition module.
– Connect ohmmeter to ground
and the short circuit wire.
– Set Master Control lever to "0".
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The measured resistance must be
about 0 Ohm. If the reading is much
higher, there is a break in the wire
and the wire or Master Control lever
must be replaced.
– Set Master Control lever to "1".
The measured resistance must be
infinitely high. If not, install a new
Master Control lever.
7.3 Testing the
Ignition Coil
7.4 Checking the
Wiring Harness

Stihl MS 230 Specifications

General

Engine Power	2.0 kW
Displacement	40.2 cc
Weight	4.6 kg
Power Output	2.0 kW
Chain Pitch	3/8"
Powerhead Weight	4.6 kg
Bar Length	40 cm
Oil Capacity	200 cc
Bar Lengths Available	35 cm (14") / 40 cm (16")