Cummins/Onan — Carburetor Adjustment Under No Load Conditions

Adjustments · Gasoline carburetor

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

Applies to: Cummins/Onan NHC-NHCV, Cummins/Onan NHC-NHCV engine

Procedure

1. Perform steps 1 and 2 of Adjustment Under Load.
2. Pull governor mechanism to slow unit to about 400-500 rpm.
3. Set idle adjustment screw for even operation.
4. Release governor to accelerate; adjust main needle outward about 1/4 turn if needed.
5. Set throttle stop screw at desired idle speed.

Full service-parts list: Cummins/Onan NHC-NHCV →

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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