Installation manual
STARTER
MOTOR
DESCRIPTION
111e
starting
system
includes
tlle
battery,
starter
motor,
solenoid,
and
starter
button.
When
the
starter
button
on
the
instrument
panel
is
depressed,
current
flows
and
energizes
tlle
starter's
solenoid
coil.
111e
energized
coil
becomes
an
electroillllgnet,
which
pulls
tlle
plunger
into
file
coil,
and
closes
a
set
of
contacts
which
allow
high
cun-ent
to
reach
tlle
starter
motor.
At
tlle
same
time,
the
plunger
also
serves
to
push
lImt
starter
pinion
to
mesh
witll
the
teetll
on
1I1e
flywheel.
10
prevent
danmge
to
tlle
starter
motor
when1l1e
engine
starts,
1I1e
pinion
gear
incorporates
an
over-running
(one-way)
clutch
which
is
splined
to
the
starter
annature
shaft.
111e
rotation
of
1I1e
nnming
engine
may
speed
tlle
rotation
of
1I1e
pulion
but
not
tlle
starter
motor
itself.
Once
tlle
started
button
is
released,
the
current
flow
ceases,
stop-
pUlg
the
activation
oftlle
solenoid.
The
plunger
is
pulled
out
of
contact
with
1I1e
battery-to-start
cables
by
a
coil
spring,
and
the
flow
of
electricity
is
intenupted
to
1I1e
starter.
This
weakeus
the
..
magnetic
fielda
and
the
starter
ceases
its
rotatiOlL
As
the
solenoid
plunger
is
released,
its
movement
also
pulls
the
starter
drive
gear
from
its
engagenlent
with
the
engine
flywheel.
TERMINALS
___
.,"
MOTOR--fiVdlic+
TYPICAL
STARTER
MOTOR
TROUBLESHOOTING
......
~_
SOLENOIO
Prior
to
testing,
roake
certain
the
ships
batteries
are
at
full
charge
and
11mt
tlle
startiIlg
system
wiring
COlmections
(terminals)
are
clean
and
tight.
Pay
particular
attention
to
the
ground
wire
.
connectious
on
the
engine
block
To
check
111e
wiring,
try
cranking
111e
starter
for
a
few
seconds,
never
more
11la1l
10
seconda
at
a
time,
then
run
your
hand
along
111e
wires
and
temrinals
looking
for
warm
spots
tlJa!
iIldicate
resistance.
Repair
or
replace
any
trouble
spots.
Using
a
multimeter,
test
the
voltage
between
the
positive
tenninal
stnd
on
111e
staJt
solenoid
and
1I1e
engine
block
(ground).
If
you
read
12
volts,
ale starter
is
faulty.
IGNITION
TERMINAL
TO
CONTROL
PANEL
(+)
POSITIVE
TERMINAL
~
___
--~IIMI
TERMINAL
n
To
test
tlle
ignition
circuit,
ioc,lIe
Ihe
:igJlitioni(s)
tenniIJal
(it
is
one
oftlle
small
tenniIJal
studs
and
is
wu'ecll:0
ttle
Illllltloncrn'Ult).
Use
a
screwdriver,
don't
touch
the
blade,
to
junlP
from
that
ignition
tenniIJal
to
the
positive
battery
comlection
tenniIJal
on
111e
solenoid.
If
the starter
cranks,
the fault
lies
with
the
ignition circuit
If
the
solenoid
c1lcks
but
nothing
else
happens, the starter
motor
is
probably
faulty.
;:!~~~iQ-----(+)
POSITIVE
~:Jl.6
TERMINAL
IGNITION
TERMINAL
TO
CONTROL
PANEL
.
~...--
(M)
TERMINAL
~
If
noaJing
at
all
happens
the
solenoid
iSD't
getting
current.
Check
the
battery
isolation
switch
and
iIlspect
the
wiring
CODIJectiOllS.
It
is
also
possible
that
111e
solenoid
is
defective.
A
WARNING:
There
will
be
arching
and
sparks
will
fly
when
jumping
terminals.
Be
ceriain
the
engine
space
is
free
of
potl!ntially
explosive
fumes,
especially
gasoline.
Engines & Generators
29
.