4-11
COOLING
DEVICE
The cooling fan serving also
as
flywheel cools the cylinder and cylinder head by forced air cooling.
An
air guide plate and
head cover are used to let the cooling air
go
through.
The cooling fan employs curved blades
so
Types
B
and
D
have cooling
fan
parts special to their own.
".
.
4-12
LUBRICATION
The rotating and sliding parts are being lubricated
by
scoop-
ing and splashing the oil in the crankcase with the
oil
scraper
attached to the connecting rod.
(See
Fig.
12.)
OIL
SCRAPER
Fig.
72
4-13 IGNITION
DEVICE
Models EY35 and
EY40
have a flywheel magneto type ignition system
(Fig.
13) with
an
ignition timing of 23" before TDC
(Top
Dead Center). The flywheel
(also
serving
as
fan) is fitted onto the crankshaft; and the ignition coil, contact breaker,
and
charging coil are directly assembled with the crankcase.
An
S.S.I.
electronic system (Fig.
14)
is
also
available in types,
including
a
1
SO-watt load type.
The
S.S.I.
system, except the 150-watt type, electrically advances the ignition timing. The ignition timing after this advance
is 23" before
TDC.
(See Figs.
13
and
14.)
POINT
COVER
Fig.
13
FLYWHEEL
IGNITI~N
COIL
Fig.
14
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