Cummins/Onan — Initial Start Adjustments (Carburetor)
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
Before you start
- Do not permit any flame, cigarette, or other igniter near the fuel system.
Procedure
- Set main power mixture to position shown in Figure 19.
- Turn idle screw in fully clockwise.
- Turn idle screw out 2-1/2 turns counterclockwise.
- Connect or turn on fuel supply to regulator.
- Check (smell) for propane leaks.
- Start engine; it should start within 20 seconds if fuel is available.
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.