7.
MAGNETO
The pointless electronic ignition magneto consists of a flywheel and an ignition coil.
7-1
FEATURES
This system is outer coil type without pulser and is called T.I.C. (Transistor igntion circuit type).
To
the
EY45V
engine this T.
I.
C. is equipped as standard parts.
Being different from the breaker point type ignition system this brand-new system
is
completely free from
such troubles as starting-up failure owing to dirty, burnt or corroded point surface, reduction of ignition effi-
ciency being caused
by
moisture, rough surface
of
breaker point and incorrect timing resulted from
worn
mechanical parts.
7-2
BASIC THEORY
of
T.I.C.
(See
Fig.
35.)
Resister
Ignition
Coil
T.I.C.
(Transistor igntion type) consists of the
fly-
L
\I)
wheel and ignition coiI with built-in transistor; and
’5
its basic
theory
is
as follows:
U
E
1) Revolution of the flywheel generates electricity
2
on
the primary side of the ignition coil, and the
E
electric current
A
flows.
A
turns the power tran-
3
sistor
“ON”
and the electric current
B
flows.
a
2)
The flywheel goes round further, and at the time
of ignition, the electric current
C
flows to turn
Fig.
35
the signal transistor
“ON”
to allow current
D.
At
this moment the electric current
B,
passing through the power transistor, is abruptly shut; and as
a
re-
sult, the high voltage electricity is generated on the secondary side of the ignition coil and it produces
sparks at the plug.
c.l
v)
m
3
L
(D
Q
m
In
.-
/
.-
7-3
WIRING
DIAGRAM
The following parts are not supplied with eingine as standard equipments.
STOP SWITCH
STARTER MAGNETIC SWITCH SWITCH spARKpLuG?JlB‘*c5
12V
BATTE
R
Y
COIL
AC
12V
LAMP
STARTER
IGNITION
STOP
SWITCH
.+
-
-
““67”
L”I
1
77)77.
12v
BATTERY
NOTE:
NOTE:
NOTE:
RED
(AC SOURCE)
SWITCH
GREEN/
AC
source
is
for
12V,
lOOW
load.
WHITE
The
lighting
coil
is
optional.
Rated and maximum loads
for
the
AC
I
source are
80W
and
1OOW
respectively.
Wires indicated
by
dotted lines are not
supplied with engine.
I
I
0
LAMP
7/3m
Fig.
36
.I
(AC12V-1
OOW)
-
30
-
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