Gravely 424 - Page 12

Figure
6
-
Typicol
Mognero
lgnition
Coil
The
condenser
can be tested
with
an ohmmeter
or
a
commercial
condenser
tester,
To
check with
the
ohm-
meter, remove
the
condenset
then
connect
leads
between
the
condenser
lead
and
a
good
ground
on the
en-
gine.
At
ffrs!
a low
resistance
should
be
indicated;
however,
this
should very quickly
rise
to u
f,igt value.
If
low
resistance
is
indicated
continuously,
the
condenser
is
deftnitely
faulty
and
musi
be
replaced.
lryhen
using
a
com-
mercial
condenser
tester,
follow
instructious
given
by
the
tester
manufacturer.
lGNrTroN
cotr
Ignition
coils
do not require
servicing
on
a regular
basis,
however,
the
coil
should
be kept
in
clean
condition
and
the terminals
and
connectiors
must
be
tight to
provide
good
electrical
contact.
The rirbber
nipple
on
the
high
tensioa
terminal
must
be
in
good
condition
to
prevent
leakage
of
current
across
exposed
,rrfo""i.
The coil
must
be
hooked
up
properly.
TESTING:
Special
test inshuments
are
required
to accurately
test ignition
coils. When
using
such
equipment,
carefully
follow
instructions
stated
by
the
tester
manufacturei.
e
eoil
can
be ehecked
for
op"ens with
a sl-ple
test
lamp.
To
testlor
an
open primary
winding,
connect the
two test
points
to the
primary
teirinals
-
the lamp
will
not
light
if the
cireuit
is
grounded.
To check
the secondary
circuit,
connect
one test point
to the
high
tension
terminal
and
the
other point
to
ei&er
of
the
primary
terminals.
In
this
case,
the
lamp
will
not
light
but tiny
sparks
should
be
roted
os the
test
points
are rubbed
aeross
the terminals.
If
the seeondary
is opened,
no
sparki *ill
o""ur.
If
the tests
show
that the
primary
or
secondary
is open,
replace
cuil or
test
further
with the
coil tester.
PERIilANENT
,INAGNETS
If
the strength
oJ,a
permanent
magnet
is suspected
as the
cause
of
magneto
trouble,
a
simple rough
test
will
indicate if its f,eld
strength
is
sufficient.
With the
fywheel
removed, place
the blade
of a r""!*driv"l
lrorr-
magnetized)
within
one inch
of the
permanent
magnet.
If
the fteld
strength
is sufficient,
the
blade
will
be
quickly
pulled
to
the
magnet.
u
IRON
CORI