Yamaha F150A - Checking the Armature (Starter Motor); Checking the Brush Holder

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Starter motor
Checking the armature (starter
motor)
1. Check the commutator. Clean using
600-grit sandpaper and compressed air if
dirty.
2. Measure the commutator diameter “a”.
Replace the armature if below specifica-
tion.
3. Measure the commutator undercut “a”.
4. Check the armature for continuity.
Replace if out of specification.
Checking the brush holder
1. Check the brush holder assembly for
continuity. Replace if out of specification.
Commutator standard diameter “a”:
29.0 mm (1.14 in)
Wear limit: 28.0 mm (1.10 in)
2
2
3
1
1
3
a
Commutator standard undercut “a”:
0.8mm (0.03in)
Wear limit: 0.2 mm (0.01 in)
Armature continuity:
Continuity:
“a”–“b”
No continuity:
“a”–“c”
“a”–“d”
a
a
b
c
d
a
a
b
b
d
d
c
c
e
e