Operator's Manual
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122cm Z Master 4000 Series Riding Mower
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50
If
you
see
light
brown
or
gray
on
the
insulator
,
the
engine
is
operating
properly
.
A
black
coating
on
the
insulator
usually
means
the
air
cleaner
is
dirty
.
Set
the
gap
to
0.75
mm
(0.03
inch).
g206628
Figure
48
Installing
the
Spark
Plug(s)
g028109
Figure
49
42
1
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43
44
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46
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