Onan CCK Service Manual

FIGURE 20. THERMAL MAGNETIC CHOKE ASSEMBLY
Disassembly and Repair
If the choke will not operate or will not retain an
adjustment, disassemble it for repair. For dis¬
assembly, refer to Figure 20.
If the choke will not close, check for binding,
incorrect adjustment, or incorrect assembly of the
bimetal and heater assembly. If the choke will not
open after the engine starts, check for heating. The
choke bimetal should be warm to the touch within a
minute or two after starting.
If the heater assembly will not heat properly, check for
broken heater wire, high resistance connections or
broken lead wires to the bimetal and heater assembly.
With the element at room temperature, check the
heater resistance with an ohmmeter. The resistance
should be about 37.8 to 46.2 ohms for a 12-volt
system If the heater is defective, replace. There must
be slack in the lead wires between the choke body and
the bimetal and heater assembly. When the start
button is engaged, the solenoid should cause the
spring loaded lever to contact the solenoid core, if
this does not occur, check for broken lead wires ora
defective solenoid core.
The solenoid coil should have a resistance of 2.03 to
2.31 ohms in a 12-volt system.
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Onan CCK Specifications

General

Cylinders	2
Ignition System	Battery ignition
Fuel Type	Gasoline
Cooling System	Air-cooled
Fuel System	Carburetor
Starter	Electric
Governor	Mechanical
Max RPM	1800 RPM
Engine Type	4-cycle
Bore and Stroke	3.25 x 3.625 inches (82.55 x 92.08 mm)