Checking The Armature (Starter Motor); Checking The Brush Holder - Yamaha F150A Service Manual

2
3
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.
a
Commutator standard diameter "a":
29.0 mm (1.14 in)
Wear limit: 28.0 mm (1.10 in)
3. Measure the commutator undercut "a".
2
3
1
1
Commutator standard undercut "a":
0.8 mm (0.03 in)
Wear limit: 0.2 mm (0.01 in)
4. Check the
Replace if out of specification.
a
Armature continuity:
Continuity:
"a"–"b"
No continuity:
"a"–"c"
"a"–"d"

Checking the brush holder

1. Check the brush holder assembly for
continuity. Replace if out of specification.
a
c
d
5-37
Starter motor
armature for continuity.
b
c
e
b
c
a
e
d b
a
d