Test
No.1
Ignition Coil Output and
Spark Plug Check
o
STATOR ASSEMBLY
EMERGENCY STOP
SWITCH
~
TEST
CO
NN
ECT
IONS
WHITE
RED
ENG
I
NE
. CONNECTOR
KEY
SWITCH
CO
l IGNITER
1.
Connect the
MM
-1 adaptor to the
tester
N (yel-
low) lead
wire.
2. Connect
the
tester P (red) lead
wire
to a good
ground
on the engine.
3.
Clamp
the
MM
-1 adaptor around
either
spark
pi
ug
wire
as
close to the spark plug as
possi
ble
. If insulation sleeving is over the spark
plug wire, push the sleeving back so
that
the
clip
encircles
the
spark plug
wire
directly. Do
not
allow
any metal portion of the
MM-1
clip
to
touch
the
engine.
4. Before
proceeding, be certain
that
the
engine
stop
switch,
ground
wires,
and all primary and
secondary
ignition
wiring
are
not
con
tr
i
buting
to the
prob
lem.
TEST PROCEDURE
NOTE:
After
each test
that
lights
the
Indicat
or
Lamp,
push
the Reset
button
to
turn
the
lamp
off
in preparati on for
the
next test.
3-14
ELECTRICAL
TROUBLESHOOTING
MM1
CLI
P
1. Set
the
toggle
swi
tch to the
Low
range. Set the
tester
dial to 25.
2.
Pu
ll
the
recoil starter handle to
turn
the
engine
over.
If
the
engine
start
s,
allow
it
to idle only.
Repeat this test three times
to
verify
con-
sistent output.
a.
If
the
lamp lights consi
stently
at or above
25
on t
he
scale, the i
gnition
system up to
the
spark plugs is operating properly. Remove the
spark
plugs and replace
any
pl
ug
which
is
fouled,
br
idged, or
otherw
ise
unfit
for
service.
Consider
the
possibiliti
es
that
high
heat. vi-
bration, or
moisture
may
be
ca
using ignition
problems and repeat Test No. 1 incorporating
these factors in
to
the tes
t.
b.
If
the
lamp does not
light
consistently
above
the specifi
ed
va
l
ue
or does
not
light
at all, fol-
l
ow
the steps on the next page.
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