..
7.
MAGNETO
.
,
.
7-1
'
MAGNETO
._
.
.'
".
,
r
The spark for ignition is furnished by a magneto assembly. 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
(Fig.
7-2)
The breaker points, which are mounted
in
the crankcase in-
side the flywheel should be checked twice a season
or
when-
ever the ignition, spark becomes weak. If there is,evidence
of
pitting or pyramidding, the breaker points must be cor-
rected, and then it becomes necessary to readjust the gap to
its proper clearance.
(0.4
mm
for Model EC10)
The normal breaker point opening is
0.4
mm at full separa-
tion. Since the spark timing
of
18"
is
regulated by the
point
opening, use a timihg light to obtain
an
accurate spark ad-
vance. (Refer to
"7-3
TIMING
ADJUSTMENT.")
NOTEI The point gap
of
other engines.than model EC70 is
as
follows:
EC05
:
0.35
mm
EC07-2
:
0.35mm'
ECl7
:
0.30
mm
EC25-2
:
0.35mm
I.
Ftg.
7-2
i'
To adjust breaker poixit opening, remove starting pulley, blower houshg and flywheel from the eingine and proceed as follows:
1-
(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
0.4
mm)
3)
Loosen contact suppoit plate lock screw just enough
so
that bracket can be moved.
4)
Insert
a
0.4
mm feeler gauge between the points.
CAUTION:
ADJUS?
BREAKER POINT GAP WITHOUT OPENING
IT
MORE THAN
2
mm,
OTHERWISE RATED
,-
HEEL-PRESSING FORCE MAY
NOT
BE: OBTAINED 'DUE
TO
THE BENDING
Of
CONTACT BREAKER
ARM.
5)
Apply a screw driver to.adjusting tab and move the contact support plate just enough
so
that a slight drag is felt while
sliding the feeler gauge from between the points.
6)
kghten lock screw and recheck breaker point gap.
..
7)
Pull a strip of
8
-
10
mm wide white paper through the closed points
to
remove
oil
and dust on the point surfaces.
I.
.
'
CAUTION: WHEN INSERTING
A
SHEET
OF
PAPER;, NEVER OPEN THE BREAKER POINT GAP MORE THAN:2mm.'
8)
Mount flywheel, blower housing and starting pulley on engine after adjustment.
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