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7
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4-8 CYLINDER HEAD
The cylinder head is on aluminum die-casting with a
lens-shaped combustion chamber The intake and
exhaust ports are arranged in a cross direction to
improve combustion efficiency
4-11 LUBRICATION SYSTEM
Lubricant (engine oil) is sprayed onto the parts with pressure spray by the trochoid type of oil pump, and
those parts splashes to the parts necessary to be lubricated
The trochoid pump is driven by the crankshaft Lubricant is wholly filtered by the oil pump filter plugged in the
under of the main bearing cover
4-10 COOLING SYSTEM
The engine uses a forced air-cooling system in which a cooling fan on the frywheel, reduce noise and forces
cooling air into the cylinder and cylinder head
Baffle is provided to guide the flow of cooling air
4-9 GOVERNOR SYSTEM
This engine is equipped with a centrifugal flyweight
type governor that makes it possible to operate the
engine at a constant speed, even with load
variations (The governor flyweights are mounted on
a governor gear)
GOVERNOR
GEAR
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