Description; Spark Plugs - Datsun 510 Workshop Manual

IIectricalSJStem
It does
not
leave clearance either
at
the
start
and end of
advancing
With unit
assembled
check
to
be
sure
that
driven slit and
rotor
position
tip 9
are
set
in
the
same
direction See
Figure
101
After
assembly
check
operation
of governor
before
installing
it
on
engine
Ignition timing
should be tested with unit
mounted
on
engine
IGNITION COIL
Description
The
ignition
coil is of
an
oil filled
type
The ig
nition coil
case
is filled with oil which has
good insulating
and heat radiating charac
teristics
The
ignition
coil has
a
greater
ratio between
the
primary
and
secondary windings
to
step
up
the
battery voltage to
the
high
voltage
to
cause stronger
sparks to
jump the
spark plug
gap
The
cap
is made of
alkyd
resin which offers
high
resistance to
electric
arc
and increased
insulation
Normal
Overheating
The resistor in the ignition
coil circuit
helps
produce
strong
sparks
from
starting
to
high speed
full power
operation
The internal resistor limits
to
a
maximum
safe
flow of the
primary
current
through
the
coil and distributor
contact points
Thus it
protects
the contact points during
slow
speed
operation
when
they
are
closed for
long inter
vals
The
ignition
coil and resistor should be han
dled
as a
matched
set
SPARK PLUGS
Description
The
spark plugs
are
of the resistor
type
having
0 551 in threads and 0 0276 to
0 0315
in gap The
inspection
and
cleaning
should be
made
every
suitable maintenance
period
If
necessary
replace
Note All
spark
plugs
installed
on an
engine
must
be of the
same
brand and
number of heat range
i
l
Carbon
fould
Life
Fig 103 Spark Plugs
17