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Home›Repair guides›Cummins/Onan›Carburetor Removal and Disassembly

Cummins/Onan 4MCCK / 605MCCK — Carburetor Removal and Disassembly

Repair & overhaul

For the Cummins/Onan 4MCCK / 605MCCK, from the Cummins/Onan service manual.

Applies to: Cummins/Onan 605MCCK, Cummins/Onan MCCK, Cummins/Onan MCCK engine

Before you start

  • Check for burrs on throttle shaft and choke shaft at screw attachment points; remove burrs before pulling shafts out.

Procedure

  1. Remove the fuel line, governor linkage and electric choke wire.
  2. Remove the two carburetor mounting nuts; remove the carburetor.
  3. Remove the silencer adapter and choke from the carburetor.
  4. Remove the main fuel adjustment needle (begin Spec R), the float bowl nut, and pull off the bowl.
  5. Remove the float pin and float; lift out the float valve and unscrew its seat.
  6. Remove the no-load adjusting needle, the load adjusting needle (Spec A only) and spring.
  7. Remove the throttle plate screws and plate, and pull out the throttle shaft.
  8. Remove the choke plate screws and plate, and pull out the choke shaft.

Full service-parts list: Cummins/Onan 605MCCK →, Cummins/Onan MCCK →

Source: Cummins/Onan service 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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