Installing The Flywheel; Testing Ignition Module With Zat 3 Tester; Testing Ignition Module With Zat 4 Tester - Stihl 4180 Series Service Manual

20
Mount the puller 4119 890 4501 (21) with screws (20)
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from clutch.
Turn screw (22) of puller 4119 890 4501 (21)
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clockwise.
Remove the flywheel (10).
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8.3

Installing the Flywheel

Degrease taper on crankshaft stub and in flywheel (7)
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hub.
25
Fit locking screw 4282 890 2700 (25).
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Place the flywheel (10) on the crankshaft taper.
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Turn the crankshaft clockwise until the piston butts
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against the locking screw.
Fit the nut (11) on the crankshaft and tighten it down.
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Install the clutch, @ 9.5.
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Remove the locking screw 4282 890 2700.
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Insert and tighten down the spark plug (16).
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Fit the boot (14) on the spark plug (16).
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Install the fan housing, @ 7.3
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Install the shroud, @ 4.3.
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18
8.4
21
20
22
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N
N
N
N
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If no spark is visible in the ZAT 3 window, check ignition
system with the aid of the troubleshooting chart.
8.5

Testing Ignition Module with ZAT 3 Tester

Remove the cover, @ 4.3
Pull boot (11) off the spark plug.
Unscrew the spark plug (16).
Connect ZAT 3 ground terminal to the muffler (arrow).
Connect the spark plug boot (14) to the ZAT 3.
Set spark gap on ZAT 3 to about 2 mm.
Pull the starter several times and observe the spark
window on the ZAT 3 at the same time:

Testing Ignition Module with ZAT 4 Tester

Interactive video "Testing Ignition Module with
ZAT 4 Tester"
Series 4180 Powerhead