Cummins/Onan — Carburetor Removal and Disassembly

Repair & overhaul

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan NH engine

Procedure

1. Remove the fuel line, air cleaner hose, governor linkage and choke wires.
2. Remove the two carburetor mounting nuts and remove the carburetor.
3. If equipped with automatic choke, remove the two screws fastening choke to carburetor and remove assembly.
4. Remove the main jet assembly and bowl.
5. Remove the float pin and float.
6. Lift out the fuel inlet valve and unscrew the valve seat.
7. Remove the no load adjusting needle.
8. Remove throttle plate screws and plate; pull out throttle shaft.
9. Remove choke plate screws and plate; pull out choke shaft.

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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