Cummins/Onan — Carburetor Cleaning and Repair

Maintenance

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

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Procedure

1. Soak all metal components not replaced in carburetor cleaner; do not soak non-metal parts.
2. Clean carbon from the bore, especially where throttle and choke plates seat.
3. Dry all passages with low-pressure air (35 PSI); do not use wire.
4. Check adjustment needle; replace if damaged. Replace float if loaded with fuel or damaged.
5. Check choke and throttle shafts for excessive play and replace if necessary.
6. Replace old components with new parts.

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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