Yamaha F115A - Measuring the Brushes

8-29
–+
ELEC
E
STARTER MOTOR
3. Check:
• Commutator undercut
Dirt/foreign matter → Clean.
(with compressed air)
8440
4. Measure:
• Commutator undercut a
Out of specification → Replace the
armature.
Commutator undercut limit
0.2 mm (0.01 in)
8450
5. Check:
• Armature continuity
Out of specification → Replace.
Armature continuity
Commutator
segments a
Continuity
Segment –
Armature core b
No continuity
Segment –
Armature shaft c
No continuity
8460
MEASURING THE BRUSHES 8
1. Measure:
• Brush length
Out of specification → Replace the
brush assembly.
Brush length limit a
9.5 mm (0.37 in)
8470