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6.
MAGNETO
6-1
MAGNETO
The spark for ignition is furnished by a magneto assembly. The magneto consists of a flywheel, ignition coil
and contact breaker assembly (including condenser),
of
which flywheel is mounted on crankshaft and igni-
tion coil contact breaker are mounted in crankcase directly. The
EY20V
type engine normally incorporates a
solid state ignition system
(T.I.C.)
described in
6.5
"SOLID STATE IGNITION."
6-2
BREAKER POINT ADJUSTMENT
(Fig.41)
The breaker points, which are mounted in the crank-
case inside the flywheel should be checked twice a
season or whenever the ignition spark becomes weak.
If there is an evidence
of
pitting or pyramidding, the
breaker points must be corrected, and then
it
be-
comes necessary to readjust the gap to its proper
clearance.
The normal breaker point opening (point gap) is
0.35
mm at full separation. Since the spark timing
of
23"
is
regulated by the point opening, use a tim-
ing
light to obtain an accurate spark advance. (Refer
/
to
"6-3
TIMING ADJUSTMENT.")
Fig.
4
1
To
adjust breaker point opening, remove starting pulley, blower housing and flywheel from the engine
and
proceed
as
follows: (See Fig.
41.)
Remove the breaker cover from the contact breaker.
,
Turn the crankshaft over until the breaker arm comes in contact with the high point
of
the breaker cam.
(Maximum point opening:
0.35
mm)
Loosen the contact support plate lock screw just enough
so
that breaker can be moved.
Insert
a
0.35
mm
feeler gauge between the points.
Caution: Adjust the breaker point gap without opening
it
more than
2
mm, otherwise rated heel-pressing
Apply
a
screw driver to adjust tab and move the contact support plate just enough
so
that a slight drag is
felt while sliding the feeler gauge from the gap between the points.
Tighten the lock screw and recheck the breaker point gap.
Pull
a
strip of
8
-
10
mm wide white paper through the closed points to remove oil and dust on the
point surfaces.
Caution: When inserting a sheet of paper, never open the breaker point gap more than
2
mm.
Mount the flywheel, blower housing and starting pulley on the engine after adjustment.
force may not be obtained due to the bending
of
contact breaker arm.
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28
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