Service Repair Manual

GENERAL (FBC)
Electric Auto Choke System
In the carburetor electric choke system, a bimetal choke spring
is heated by an electric heater (PTC heater*).
As the bimetal spring is heated by the heater after start-up, the
bimetal opens the choke valve gradually by thermal expansion
and pushes down the stopper lever.
The lower the temperature when the engine is started, the
tighter the bimetal closes the choke valve, thus improving at cold
weather starting.
*PTC heater : Positive Temperature Coefficient heater
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