Cummins/Onan — Idle Fuel Mixture Adjustment: These instructions
For these Cummins/Onan models: BGM, NHM.
Applies to: Cummins Onan Nhm
Procedure
- 1. If the carburetor has been overhauled, gently
- 2. Start the genset and let it warm up for ten min-
- 3. Disconnect the load (check for zero amps).
- 4. Push the adjustment limiter cap on over the
Source: manual:965-0531B Onan BGM NHM Marquis series RV Genset Service manual (02-1991).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.