Yamaha F25A - Starter Motor Service Points; Pinion Gear Assy. Inspection; Armature Inspection

8-23
–+
ELEC
E
STARTER MOTOR
SERVICE POINTS
Pinion gear assy. inspection
1. Inspect:
● Pinion gear teeth
Damage/wear → Replace.
2. Check:
● Clutch movement
Incorrect → Replace.
NOTE:
Rotate the pinion gear assy. clockwise to
check that it moves freely. Also, rotate the
pinion gear assy. counterclockwise to make
sure that it locks.
Armature inspection
1. Measure:
● Commutator undercut a
Out of specification → Replace.
Commutator undercut limit:
0.8 mm (0.03 in)
2. Check:
● Armature coil continuity
Out of specification → Replace.
Armature coil continuity:
Commutator
segments a
Continuity
Segment -
Armature core b
No continuity
Segment -
Armature shaft c
No continuity