Yamaha F350B - Checking the Brush Holder

5-47
Starter motor
2. Measure:
• Commutator diameter “a”
Below specification  Replace the arma-
ture.
3. Measure:
• Commutator undercut “a”
Below specification  Replace the arma-
ture.
4. Check:
• Armature continuity
Out of specification  Replace the arma-
ture.
Checking the brush holder
1. Check:
• Brush holder assembly continuity
Out of specification  Replace.
2. Measure:
• Brush length
Below specification  Replace the brush.
Standard commutator diameter
29.0 mm (1.14 in)
Wear limit
28.0 mm (1.10 in)
Standard commutator undercut
0.8 mm (0.03 in)
Wear limit
0.2 mm (0.01 in)
Armature continuity
“a” “b” “c” “d”
a
a
Brush holder assembly continuity
“a” “b” “c” “d” “e”
Standard brush length
15.5 mm (0.61 in)
Wear limit
9.5 mm (0.37 in)
a
b
c
d
a
a
b
b
d
d
c
c
e
e