Onan CCKA User Manual

SISSON CHOKE
This choke should not require any seasonal readjust¬
ment If adjustment becomes necessary, pull choke
lever up and insert a 1/16-inch (1.59 mm) diameter rod
through shaft hole (opposite end from lever) and
engage rod in notch of mounting flange, to lock shaft
in place.
Loosen the choke lever clamp screw. With air inlet
removed, adjust choke lever so carburetor choke
plate is completely closed, or not more than 5/16-inch
(7.94 mm) open. Tighten choke lever clamp screw and
remove locking rod from shaft. See Figure 22.
SWIVEL CARBURETOR
FIGURE 22. SISSON CHOKE
FIGURE 23. TESTING GAS REGULATOR
pTTuTioin A soap bubble placed over the regu-
iator outlet will not accurately test
for regulator closing. The resistance of the soap bub¬
ble, when multiplied by f/ie greater area of the regula¬
tor diaphragm, is enough to shut off this very sensi¬
tive demand type regulator .
ADJUSTING THE GAS PRESSURE
REGULATOR
The maximum allowable inlet pressure is 8 ounces;
(3.45 kPa) minimum 2 ounces (0.86 kPa). If gas line
pressure is greater than 8 ounces, install a primary
regulatorto reduce the pressure. The regulator has an
adjustment to control the maximum pressure at which
the regulator shuts off when there is no demand. To
obtain maximum regulator sensitivity, adjust it to just
shut off at your line pressure when there is no
demand. Adjust the regulator for shut off when there
is no demand to prevent gas leaks. The factory
adjusted shutoff is between 2 and 4 ounces (0.86 and
1.72 kPa) If gas line pressure is between 4 and 8
ounces (1.72 and 3.45 kPa), readjust the screw
Figure 23.
1. Use a manometer which reads up to 14 inches
(355.6 mm) water column.
One ounce per square inch equals 1.73 inches (43.94 mm)
water column. Likewise, one Inch water column equals 0.58
ounce per square inch.
2. Shut off gas supply. Temporarily remove the 1/8-
inch pipe plug at regulator inlet for testing
pressure.
3. Connect manometer to read gas supply line
pressure.
4. Open gas supply line valve. Without delay, alter¬
nately cover and uneoverthe regulator outlet with
the palm of your hand. At the same time watch the
manometer. If the regulator closes completely, as
desired, the manometer will hold a steady
reading.
5. If the manometer reading drops slightly each time
you remove your hand, the regulator is leaking.
Turn the adjusting screw inward just far enough
so that the manometer reading remains constant
when you repeatedly cover and uncover the
regulator outlet with your hand.
6. Close the gas supply line valve. Remove
manometer. Bleed air from gas supply line. Install
test-hole plug in regulator. Open gas supply line
valve.
7. See that vent fitting is installed in the regulator
hole.
8. With a clamp on each end, secure the hose
between the regulator outlet nipple and the
carburetor inlet.
9. Operate the engine to assure quick starting
results.

Onan CCKA Specifications

General

Cylinders	2
Ignition System	Battery ignition
Engine Type	4-cycle
Bore	3.25 in (82.55 mm)
Power Output	Varies with model. e.g., 6.5 kW (CCK)
Horsepower	10 hp
Starter	Electric