Cummins/Onan CCK-3CR/16000S Engine Engine
The Cummins/Onan CCK-3CR/16000S is a 8.16 L 2-cylinder air cooled, l-head, horizontally opposed engine rated at 1800 rpm. It powers generator sets from Cummins/Onan, including the CC. It holds 3.79 L (1.0 gal) of oil.
Also known as: Onan CCK-3CR/16000S
Engine specifications
| Oil capacity | 3.79 L |
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| Displacement | 8.16 L |
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| Cylinders | 2 |
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| Aspiration | Air Cooled, L-Head, Horizontally Opposed |
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| Rated speed | 1800 rpm |
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Generator sets powered by this engine
1Common problems
15- VOLTAGE UNSTEADY BUT ENGINE NOT MISFIRING
Cause: Speed too low.
Fix: Adjust governor to correct speed. - VOLTAGE LOW AT FAR END OF LINE BUT NORMAL NEAR POWER PLANT
Cause: Too small line wire for load and distance.
Fix: Install larger or extra wires. Or reduce load. - The speed may remain about the same or increase when the load is applied, resulting in a frequency 1 or 2-cycles Aigker than the no load frequency.
Fix: If the rise in frequency is more than 2-cycles, lessen the internal spring tension. If there is a drop in the frequency, increase the booster internal spring tension. To increase the tension, pull out on the spring bracket, and move the pin to a different hole. - Spark plug burned or carboned.
Fix: Install new plug. - Sludge on oil cup screen.
Fix: Clean screen & air sump. - SHARP METALLIC THUD, ESPECIALLY WHEN COLD ENGINE FIRST STARTED
Cause: Low oil supply.
Fix: Add oil. - Preignition can occur causing engine damage.
Cause: Not removing lead deposits before switching from leaded to non-leaded gasoline. - PINGING SOUND WHEN ENGINE IS SUDDENLY OR HEAVILY LOADED!
Cause: Wrong spark plug.
Fix: Install correct spark plug. - Operating problems due to the fuel system.
Fix: Check the fill cap to make sure the vacuum and pressure relief valve is working properly. - Oil too light or diluted from leaking fuel pump diaphragm.
Fix: Drain. Refill with proper oil. Repair or replace fuel pump. - Oil too heavy grade.
Fix: Drain. Refill. - Oil taa low.
Fix: Add oil. - Oil relief valve stuck.
Fix: Clean by-pass. Replace if needed. - Oil badly diluted.
Fix: Change oil. - Low or Discharged Battery
Fix: Faulty Starter, Faulty Start Solenoid
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan CCK-3CR/16000S.
Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
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| Air filter | | | — | 500 hr | find |
| Fuel filter | | | — | 500 hr | find |
| Oil filter | | | — | 500 hr | find |
| Belt | Place a drop of light oil on breaker arm pivot shaft every 200 operating hours. | | — | | find |
| Coolant | Change Coolant | | — | | |
| Oil | API SE or SE/CC (gasoline operation only) | 3.79 liters | — | 100 hr | |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Common questions
What is the oil capacity of the Cummins/Onan CCK-3CR/16000S?
The Cummins/Onan CCK-3CR/16000S engine has an oil capacity of 3.79 liters.
What is the displacement of the Cummins/Onan CCK-3CR/16000S?
The Cummins/Onan CCK-3CR/16000S has a displacement of 8.16 liters with 2 cylinders.
Which generators use the Cummins/Onan CCK-3CR/16000S engine?
The Cummins/Onan CCK-3CR/16000S powers 1 generator set(s), including Cummins/Onan CC.
How often should you change the oil in the Cummins/Onan CCK-3CR/16000S?
The Cummins/Onan CCK-3CR/16000S oil change interval is every 100 hours.
What is a common problem with the Cummins/Onan CCK-3CR/16000S engine?
A commonly reported issue on generators using the Cummins/Onan CCK-3CR/16000S is: VOLTAGE UNSTEADY BUT ENGINE NOT MISFIRING. Cause: Speed too low.. Fix: Adjust governor to correct speed..