Kohler COURAGE SV710-740 - Page 50

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• When the engine is at rest, and the throle is
in the fast position, the tension of the governor
spring holds the throle plate open. When the
engine is operating, the governor gear assembly
is rotating. The force applied by the regulating
pin against the cross sha tends to close the
throle plate. The governor spring tension and
the force applied by the regulating pin balance
each other during operation, to maintain engine
speed.
• When load is applied and the engine speed and
governor gear speed decreases, the governor
spring tension moves the governor lever to open
the throle plate wider. This allows more fuel
into the engine, increasing engine speed. As
speed reaches the governed seing, the governor
spring tension and the force applied by the
regulating pin will again offset each other to hold
a steady engine speed.
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The governed speed seing is determined by the
position of the throle control. It can be variable or
constant, depending on the engine application.
Always use new gaskets when servicing or
reinstalling carburetors. Repair kits are available
which include new gaskets and other components.
Service/repair kits available for Nikki carburetors and
affiliated components are:
Carburetor Repair Kit
Float Kit
High Altitude Kit (1219-2434 m/4,000-8,000 .)
Solenoid Assembly Kit
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Reassembly is essentially the reverse of the
disassembly procedure. Use new gaskets, springs and
adjusting screws as provided in the carburetor repair
kit. Also use new carburetor and intake manifold
gaskets. Set the idle speed (RPM) adjusting screw (if
equipped) 2-1/4 turns open for initial adjustment and
make final adjustments as described earlier.
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The engine is equipped with a centrifugal flyweight
mechanical governor. It is designed to hold the engine
speed constant under changing load conditions. The
governor gear/flyweight mechanism is mounted
inside the crankcase on the oil pan, and is driven
off the gear on the camsha. The governor works as
follows:
• Centrifugal force acting on the rotating governor
gear assembly causes the flyweights to move
outward as speed increases. Governor spring
tension moves them inward as speed decreases.
• As the flyweights move outward, they cause the
regulating pin to move outward.
• The regulating pin contacts the tab on the cross
sha causing the sha to rotate. One end of the
cross sha protrudes through the crankcase. The
rotating action of the cross sha is transmied to
the throle lever of the carburetor through the
external linkage. See Figure 5-34.
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