Checking The Brushes; Checking The Starter Motor Operation - Yamaha FT50C Service Manual

4. Measure the commutator undercut a.
Replace the armature if out of specifica-
tion.
Commutator undercut limit:
0.2 mm (0.01 in)
5. Check the armature
Replace if out of specifications.
Armature continuity
Commutator segments b
Segment –
Armature core c
Segment –
Armature shaft d

Checking the brushes

1. Measure the brush length. Replace the
brush assembly if out of specification.
62Y5A11
for continuity.
Continuity
No continuity
No continuity
Brush length limit a:
12.0 mm (0.47 in)
2. Check the brush holder for continuity.
Replace if out of specifications.
Brush assembly continuity
Brush 1 – Brush 2
Brush 1 – Brush 3
Brush 2 – Brush 3
Brush holder 4 – Brush
assembly holder 5

Checking the starter motor operation

1. Check the operation of the starter motor
after installing it to the power unit.
Starter motor
1
2
3
4
5
6
Continuity
No continuity
7
8
9
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