Onan CCK Service Manual

THERMAL MAGNETIC CHOKE
(Optional}
This choke uses a heating element and a heat sensi¬
tive bimetal spring to open the choke plate. The
choke solenoid, actuated during engine cranking
only, closes the choke plate according to ambient
temperature. During gaseous fuel operation, the
choke plate is locked in the full open position by the
choke lock wire. Figure 15.
If adjustment is required, use the following instruc¬
tions. Choke bimetal spring must be at ambient
temperature. Allow engine to cool at least one hour
before setting. Adjust choke by turning the choke
body, which engages a link connected to a bimetal
choke spring.
Remove air cleaner and adapter to expose the car¬
buretor throat. Loosen the screw which secures the
choke body. Rotate choke body clockwise to increase
choke and counterclockwise to decrease choke action
{leaner mixture). Refer to Figure 19 for correct choke
setting according to ambient temperature. Use drill
rod or shank of drill bit to measure choke opening.
Ambient Temperature (°F) 60 65
70 75 80
85 90 100
Choke Opening (Inches)
1/8
9/64
5/32 11/64 3/16 13/64
7/32 1/4
Ambient Temperature (°C) 16 IS 21 24
27
29 32
38
Choke Opening (mm)
3.18 3.57
3.97 4.37
4.76 5.16
5.56 6.35
FIGURE 19. THERMAL MAGNETIC CHOKE SETTINGS
26

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)