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4-7
CYLINDER
HEAD
The cylinder head
is
an aluminum die-casting
which utilizes semi-spherical type combustion
chamber
for
the high combustion efficiency.
4-8
VALVE ARRANGEMENT
The intake valve is located on flywheel side
of
the
cylinder head.
The cooling fins and passages design
lead
cool-
ing air to the exhaust valve area for the optimum
cooling.
Hard
alloy
valve
seats
are molded in the cylinder
head and stellite is fused
to
the
exhaust valve face.
4-9
GOVERNOR
SYSTEM
Fig.
4-7
EXHAUST
VALVE
INTAKE
VALVE
Fig.
4-8
The
governor is
a
centrifugal flyweight type which
ensures constant operation at the selected speed
against load variations.
The
governor gear with governor weights is
in-
stalled inside
of
main bearing cover and driven
by
the crankshaft.
Fig.
4-9
f'
,A
-
8-