Cummins/Onan 305CCK / 5CCK — Changing to Gasoline Operation

Operation · Carburetor/fuel system

For the Cummins/Onan 305CCK / 5CCK, from the Cummins/Onan operator's manual.

Applies to: Cummins/Onan 5CCK

Procedure

1. Shut off supply of natural gas, Propane, or Butane vapor.
2. Open gasoline shut-off valve.
3. Unscrew carburetor float lock all the way outward to back seat.
4. Set spark plug gap as given in Table of Clearances.
5. Check choke is free and works easily.
6. Start engine as described; adjust gasoline main jet if engine runs unevenly under load.

Full service-parts list: Cummins/Onan 5CCK →

Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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