Checking The Starter Motor - Yamaha 2004 Rhino 660 YXR660FAS Service Manual

ELECTRIC STARTING SYSTEM

CHECKING THE STARTER MOTOR

1. Check:
• commutator
Dirty → Clean it with #600 grit sandpaper.
2. Measure:
• commutator diameter a
Out of specification → Replace the starter
motor.
3. Measure:
• mica undercut b
Out of specification → Scrape the mica
using a hacksaw blade.
NOTE:
Scrape the mica to the proper measurement
using a hacksaw blade which has been
grounded to fit the commutator.
4. Check:
• armature coil (insulation/continuity)
Defects → Replace the starter motor.
M MMM
a. Connect the pocket tester for the continuity
check 1 and insulation check 2.
b. Measure the armature resistances.
c. If the resistance is incorrect, replace the
starter motor.
L LLL
9 - 21
ELEC
Outside diameter
28 mm (1.10 in)
<Wear limit>:
27 mm (1.06 in)
Mica undercut
0.7 mm (0.03 in)
M MMM M M MMM M M MMM M M MMM M
Armature coil resistance
Continuity check
0.025 ~ 0.035 Ω at 20 °C (68 °F)
Insulation check
More than 1 MΩ at 20 °C (68 °F)
L LLL L L LLL L L LLL L L LLL L
– +
M MMM M MMM
L LLL L LLL