3.
FEATURES
1.
The overhead valve design offers compactness, light weight and ideal combustion charastristics
,"-,
resulting in more power from less fuel and prolonged engine life.
2.
The vibration free design with the twin balancer system and lighter reciprocating parts.
3.
The
parts
such as a large capacity muffler, dual element air cleaner, helical type balancer gear
with extra long teeth and a blower housing and muffler cover made of resin laminated
"DAMPING
SHEET"
reduce noise to
a
minimum level.
4.
The automatic decompression system offers easy, dependable starting.
5.
The muffler and carburator are located on opposite sides, making the arrangements for cooling
air flow much easier in the design
of
power equipment.
4.
GENERAL DESCRIPTION
OF
ENGINE COMPONENTS
4-1
CYLINDER AND CRANKCASE
The cylinder and crankcase
is
single piece
aluminum diecasting. The cylinder liner, made
of
special cast iron, is molded into the aluminum
casting.
The crankcase has a mounting surface onthe
output shaft side, where the main bearing cover
is
attached. (See Fig.
1.)
Fig.
I
4-2
MAIN
BEARING
COVER
The main bearing cover
is
an aluminum
diecasting, which
is
mounted on the outprt shaft
side of the crankcase. Remove the main bearing
cover
to
inspect inside
of
the engine.
The main bearing cover also functions as an oil
pan, with
a
trochoid oil pump,
oil
filler and
oil
drain plug. (See Fig.
2.)
Fig.
2
-4-
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