Inspection And Repair - Yamaha YW50AP Service Manual

a
A
B
A
B
ELECTRIC STARTING SYSTEM
YP803034

INSPECTION AND REPAIR

1. Inspect:
2. Measure:
3. Measure:
a
NOTE:
The mica insulation of the commutator must
be undercut to ensure proper operation of com-
mutator.
4. Inspect:
A
B
O: Continuity
x: No continuity
Bad condition→Replace.
7-24
8 Commutator
Dirt→Clean it with #600 grit sandpaper.
8 Commutator diameter a
Commutator wear limit:
15.1 mm (0.59 in)
Out of specification→Replace the starter
motor
8 Mica undercut a
Mica undercut:
1.05 mm (0.04 in)
Out of specification→Scrape the mica to
the proper value (a hacksaw blade can
be ground to fit).
8 Armature coil resistances (installation/
continuity)
Defects→Replace the starter motor.
If commutator is dirty, clean it with sand-
paper.
Good
condition
? ?
×
?
– +
ELEC
Bad condition
× ×
×
?