Cummins/Onan — Idle Screw and Idle Stop Adjustment
Adjustments · Gas carburetor
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan NHP / NHPV engine
Procedure
- Run engine at idle speed (1200 rpm) for ten minutes.
- Adjust idle screw for maximum speed.
- Set idle stop screw speed at 1350 rpm.
- Turn idle screw out until engine speed slows to 1200 rpm.
Specs & values
- 1200 rpm idle
- 1350 rpm idle stop
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.