3.
FEATURES
1.
The overhead valve design offers a compactness, light weight and ideal combustion characteristics
2.
An
optimum lubrication and better tilted operation thanks to upright cylinder design.
3.
A
crossflow arrangement
of
intake and exhaust
ports
ensures stable performance under
high
ambient
4.
The automatic decompressiom system lightens the recoil pull force by
40%
comparing to the
5.
An
easy operation
thanks
to
integrated engine control system.
6.
Combustion and mechanical noises have been carefully reviewed for better tonal quality
and
lower
7.
Optimally designed reciprocating parts reduce the vibration level
of
the engine.
EH25
engine equips
resulting
in
more power from less fuel and prolonged engine life.
F.
temperature.
conventional
SV
engines.
cnginc noise.
sjnglc through-balancer shaft.
4.
GENERAL DESCRIPTION OF ENGINE COMPONENTS
4-1
CYLINDER
AND
CRANKCASE
The
cylinder and crankcase is single piece alu-
minum
diecasting. The cylinder liner, made
of
special cast iron, is molded
into
the aluminum
casting.
The crankcase has
21
mounting surface
on
the
output
shaft
side, where the main bearing cover
is
attached. (See Fig.
4-1
.)
Fig.
4-1
i
OILGAUGE
OIL
GAUGE
I-GKR
CENTERING
""
""
~
/,"
Fig.
4-2
-8-
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