Series 4180 Powerhead18
N Mount the puller 4119 890 4501 (21) with screws (20)
from clutch.
N Turn screw (22) of puller 4119 890 4501 (21)
clockwise.
N Remove the flywheel (10).
8.3 Installing the Flywheel
N Degrease taper on crankshaft stub and in flywheel (7)
hub.
N Fit locking screw 4282 890 2700 (25).
N Place the flywheel (10) on the crankshaft taper.
N Turn the crankshaft clockwise until the piston butts
against the locking screw.
N Fit the nut (11) on the crankshaft and tighten it down.
N Install the clutch, @ 9.5.
N Remove the locking screw 4282 890 2700.
N Insert and tighten down the spark plug (16).
N Fit the boot (14) on the spark plug (16).
N Install the fan housing, @ 7.3
N Install the shroud, @ 4.3.
8.4 Testing Ignition Module with ZAT 3 Tester
N Remove the cover, @ 4.3
N Pull boot (11) off the spark plug.
N Unscrew the spark plug (16).
N Connect ZAT 3 ground terminal to the muffler (arrow).
N Connect the spark plug boot (14) to the ZAT 3.
N Set spark gap on ZAT 3 to about 2 mm.
N Pull the starter several times and observe the spark
window on the ZAT 3 at the same time:
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 4 Tester
20
20
21
22
0000-GXX-1928-A0
25
0000-GXX-1966-A0
Interactive video “Testing Ignition Module with
ZAT 4 Tester”
5910 850 4520
ZAT 3
0000-GXX-2322-A0
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