7.
MAGNETO
7-1
MAGNETO
The spark for ignition
is
furnished by
a
magneto in models EY14,
EY18-3,
EY23, EY25-2 and
EY27-2. In these models, magnetos manufactured
by
KOKUSAN DENKI K.K.
are
used.
(The
model
EY23
is
based on noncontact ignition system.)
The
magneto consists
of
a
flywheel, ignition coil, and breaker assembly (including condenser),
of
which flywheel
is
mounted on crankshaft and ignition
coil
and
breaker
assembly
are
mounted in
crankcase directly.
7-2
BREAKER POINT ADJUSTMENT
The
breaker points, which
are
mounted in
the
crankcase inside the flywheel should
be
checked twice
a
season
or
whenever the
ignition
spark
becomes weak. If
there
is
evidence
of
pitting
or
pyramidding,
the
breaker points must
be
corrected, and then
it
becomes necessary
to
readjust
the
gap
to
its
proper clearance. (0.35 mm, 0.014 inch)
The
normal
breaker
point opening
is
0.35
mm
at
full
separation. Since
the
spark timing
of
23O
is
regulated by
the
point opening, use
a
timing
light
to
obtain an accurate
spark
advance.
To
adjust
breaker
point opening, remove
starting pulley, blower housing and flywheel
from
the
engine and proceed
as
follows.
(See
Fig.
7-2)
1)
Remove
breaker
cover
from
contact
breaker.
2)
Turn crankshaft over until
breaker
arm
comes in contact with
the
high
point
of
the
breaker cam. (maximum point opening
of
0.35
mm)
3)
Loosen contact support plate
lock
screw,
just enough
so
that
bracket
can
be
moved.
4) Insert
a
0.35
mm feeler gauge between
the
points.
CAUTION: ADJUST BREAKER POINT GAP
WITHOUT OPENING
IT
MORE THAN
2
mm,
OTHERWISE RATED
HEEL-
PRESSING FORCE
MAY
NOT OBTAINED
DUE TO
THE
BENDING OF CONTACT
BREAKER ARM.
5) Insert
a
0.35
mm feeler gauge between
the points.
I
Fig.
7-2-A
(EY74, EY
18-31
Fig.
7-2-6
(E
Y25-2,
E
y27-21
6)
Apply
a
screw driver
to
adjusting
tab
and move
the
contact support plate just enough
so
that
7)
Tighten
lock
screw and
recheck
breaker
point
gap.
8)
Pull
a
strip
of
8
%lo
rnm wide white paper through
the
closed
points
to
remove oil and dust.
CAUTION: IN THIS CASE NEVER OPEN THE BREAKER POINT
GAP
MORE
THAN 2
mm.
9)
Mount flywheel, blower housing and starting pulley on engine after adjustment.
a
slight
drag
is
felt while sliding
the
feeler gauge
from
between
the
points.
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29
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