Onan CCK User Manual

OPERATION
[BEFORE STARTING
[Crankcase Oil
Oil capacity of the CCK generator set is 4 U.S. quarts
(3.79 lit). Fill the crankcase until the oil reaches the
“FULL” mark on the oil level indicator (Fiqure 4) DO
NOT OVERFILL.
WARNING | Do NOT check oil whi *e t he generator set is
hhhhmhJ operating. Hot oil could cause bums by
: blowing out of oil fill tube due to crankcase pressure.
CAP AND OIL
LEVEL INDICATOR;
KEEP OIL
AT THIS LEVEL
NEVER OPERATE
ENGINE WITH OIL
BELOW THIS LEVEI_
ALWAYS REPLACE
CAP TIGHTLY, OR
OIL LEAKAGE MAY
OCCUR.
Check oil level daily and change oil every 100 normal
operating hours. See Figure 5 for location of oil drain.
If operating in extremely dustyordirtyconditions, the
oil might have to be changed sooner. When adding oil
between changes, use the same brand as in the
crankcase. Various brands of oil might not be com¬
patible when mixed.
TEMPERATURE fiBinc
Below 0°F (-18° C) .5W or 5W-30
0° to 32° F (-18° C to 0°C) .lOW or 10W-40
Above 32° F (0°C) . 30
Oil consumption may be higher with a multigrade oil
than with a single-grade oil if both oils have com¬
parable viscosities at 210°F (99° C). Therefore, single
grade oils are generally more desirable unless an¬
ticipating a wide range of temperatures. Use the
proper grade oil for the expected conditions.
Use of the same grade and quality oil as that used in
your recreational vehicle engine is acceptable as long
as unit is serviced regularly and oil meets API
designation SE or SE/CC. Other factors (primarily
temperature) should also be considered when selec¬
ting appropriate engine oil.
FIGURE 4. CHECKING OIL LEVEL
Use a heavy duty oil with the API (American
Petroleum Institute) designation SE or SE/CC
(gasoline operation only). If this oil is not available,
SD or SD/CC designated oil can be used.
FIGURE 5. OIL DRAIN AND FILL
Recommended Fuel
All Onan AC electric generating sets for recreational
vehicles use gasoline fuel. Because any AC electric
generating set runs at a constant speed, lead deposits
tend to build up in the combustion chambers. Forthis
reason, use clean, fresh, lead free or low-lead gas¬
oline. Regular grade gasoline may also be used, but
DO NOT use highly leaded premium types of fuel.
For new engines, the most satisfactory results are
obtained by using nonleaded gasoline. For older
engines that have previously used leaded gasoline,
the cylinder heads must be taken off and all lead
deposits removed from engine before switching to
nonleaded gasoline.
leaded gasoline, if
damage.
Lead deposits must be removed from an
engine before switching from leaded to non-
not, preignition can occur causing engine
| WARNING \ ^ a so * s n e leakage to or around the compart-
ment is a definite hazard. The ventilation
system should provide a constant flow of air to expei any
accumulation of fuel vapor while the vehicle is in transit. Com¬
partments must be vapor tight to the interior to keep fumes from
within the vehicle.
8

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)