Yamaha F50A - Checking the Brushes; Checking the Starter Motor Operation

62Y3A11
8-24
1
2
3
4
5
6
7
8
I
4. Measure the commutator undercut
a
.
Replace the armature if out of specifica-
tion.
5. Check the armature for continuity.
Replace if out of specifications.
Checking the brushes
1. Measure the brush length. Replace the
brush assembly if out of specification.
2. Check the brush holder for continuity.
Replace if out of specifications.
Checking the starter motor operation
1. Check the operation of the starter motor
after installing it to the power unit.
Commutator undercut limit:
0.2 mm (0.01 in)
Armature continuity
Commutator segments
b
Continuity
Segment –
Armature core
c
No continuity
Segment –
Armature shaft
d
No continuity
Brush length limit
a
: 12.0 mm (0.47 in)
Brush assembly continuity
Brush
1
– Brush
2
Continuity
Brush
1
– Brush
3
Brush
2
– Brush
3
Brush holder
4
– Brush
assembly holder
5
No continuity
Starter motor