Checking The Armature (Starter Motor); Checking The Brush Holder - Yamaha F30B 2018 Service Manual

Checking the armature (starter motor)

1. Check:
• Commutator
Dirty  Clean using 600-grit sandpaper
and compressed air.
2. Measure:
• Commutator diameter "a"
Below specification  Replace the arma-
ture.
a
Standard commutator diameter
29.4 mm (1.16 in)
Wear limit
28.8 mm (1.13 in)
3. Measure:
• Commutator undercut "a"
Below specification  Replace the arma-
ture.
4. Check:
• Armature continuity
Out of specification  Replace the arma-
ture.
Armature continuity
"a"

Checking the brush holder

1. Check:
• Brush holder assembly continuity
Out of specification  Replace.
a
Brush holder assembly continuity
"a"
5-38
Standard commutator undercut
0.5 mm (0.02 in)
Wear limit
0.2 mm (0.01 in)
a
b
"b" "c"
c
d
c a
d b
"b" "c"
Starter motor
d
c
"d"
e
a
b
e
"d" "e"