Yamaha F75F - Page 121

Starter motor
5-37
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.
Standard commutator diameter
29.0 mm (1.14 in)
Wear limit
28.0 mm (1.10 in)
Standard commutator undercut
0.7 mm (0.03 in)
Wear limit
0.2 mm (0.01 in)
a
a
Armature continuity
“a” “b” “c” “d”
Brush holder assembly continuity
“a” “b” “c” “d” “e”
a
b
c
d
a
a
b
b
d
d
c
c
e
e