Yamaha Scorpio - Page 229

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– +
ELEC
ELECTRIC STARTING SYSTEM
3.Measure:
●
Mica undercut
b
Out of specification
→
Scrape the mica to
proper value use a hacksaw blade can be
ground to fit.
N
OTE:
the mica insulation of the commutator must be
undercut to ensure proper operation of com-
mutator.
Mica undercut:
1.5 mm
4.Inspect:
●
Armature coil (continuity/insulation)
Defects (s)
→
Replace starter motor.
*****************************************************
Inspecting steps:
●
Connect the pocket tester for continuity
check
1
and insulation check
2
.
●
Measure the armature coil resistances.
●
If the resistance is incorrect, replace the
starter motor.
*****************************************************
5.Measure:
●
Brush length
a
Out of specification
→
Replace.
Pocket tester:
90890-03112
Armature coil resistance:
Continuity check
1
: (
Ω ×
1)
0
Ω
at 20°C
Insulation check
2
: (
Ω ×
1k)
More than 1 M
Ω
at 20°C
Brush length limit:
3.5 mm