SECIION 6:
ELECTRIC STARTER
SEcrION CONTENTS
PAGE
GENERA1tNFORMAT|ON.....................................-....--....6'1
TROUBLESHOOTTNG...........--.......................-.................6'1
TEST EQU1PMENT
..................--....-.................................
6-2
TEST STARTER
MOTOR .....-............................................
6'2
Tening Starter So|enoid..............................................
6-2
BATTERY 1NFORMAT|ON ........
........................''............. 6-2
lnnallarion .............................................................-..6-3
CheckingBattery......................................................6'3
Tesri-q8amery.....................
............6-a
Battery Recommendations ...--.......................-........
6_4
Battery Cable Recommendalions................................
6-4
GENER,AL INFORMATION
The starter motor uses
a
geartype
engagement
method, em-
ilarto
an automobile starter When the starter
motor is adLvated,
the
pinlon gear
engages
a ring
gear
attached to
the engtne
fly\,vheeland cranks
the engine.
ENG
NE CRANKS SLOWLY
a. AdditonaLload affecting
pedormance
(see
note above).
b. Discharged
battery
c. Faulty electrical
connecrion
(battery
circuit)
d. Discharged battery
(see
alternators).
e.
Didy or worn starter motor commutator,
bearing, weak
ma9ners, erc.
f. Worn brushes orweak brush
sping.
g.Wrong
oil
viscosity for temperature expeded.
h. Battery leads too
long orWre too small.
i. Batterytoo small.
ENG NEWILL
NOI
CRANK:
a. Fau
iy
sdfety
lnte.locks.
b. Discharged or defedive
battery
c.
Faulty electical connections.
d.
Faulty
narter
motor switch
(open
cltcuit)
e. Open clrcuit
in
stader
motor.
f. Brushes sticking, etc.
g.
Faulty solenoid.
STARTER
N4OTOR SPINS 8UT DOES NOICRANK
ENGINE:
a. Sticking
pinion gear
due io di.t.
b.Damaged
pinion
or
ing
gear
c. Battery
fau
ry
or damaged.
d.Incorrect
rotation
due to
reveBed motor
polariv-a
lmolors
rotate countercockwlse
viewed {rom
pinion gear
e.
Damaged solenoid
sTARTER IVIOTOR SPINS BUTWLL
NOT STOP:
a. Defective starter switch.
b.
solenoid stuck engaged.
TEST
EQUIPMENT
The folowing
is a list of equipment
recommended to ten and
repa r starter
motors.
DIG
IAt [.,1ULTMETER:
A digital multimeter
(VOM)
may be used to readvolts, ohms,
amperes
and test diodes
(rectifiels),
Frgure 6 2.
NOTE: The Digital
MultineEr is equipped with two
fuses
to
prcvent
damage to
the
'',et€r
in the event that the
input
fimits arc exceeded.
ll the mett.r displays a rcading
of 0.00
when testing
DC output check tuses in meter Refer
to
voM opefttoB
manual for
prccedurc
for .he.king
fuses.
6-1
figute
6-1. Stader Motor
TROUBTESHOOTING
NOTE:
lf a stading
problem
it encountercd,
the engine
itseff should
be thoroughly checked to
eliminate it as the
cause of starting
difficulty, It is a
good practice
to check
the
engine for fteedom
of rctation by rehoving the
tpa*
plugs
and tuning the
qankshaft
over slowly by
hand,
to be surc it rctabs freely.
WARNING: DO NOT ROTATE ENGINE
wlTH ELECIRIC
STARTERWITH
SPARK PTUGS REMOVED.ARCING
AT
THE SPARK
PLUG ENDS MAY IGNITE THE GASOLINE
VAPOR EXITING THE SPARK
PLUG HO[E.
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