Cummins/Onan — Idle Mixture and Frequency Adjustments

For these Cummins/Onan models: BGM, NHM.

Applies to: Cummins Onan Nhm

Procedure

1. 1. Disconnect all loads (check for zero amps).
2. 2. Turn the idle mixture adjusting screw clockwise
3. 3. Push the adjustment limiter cap on over the
4. 4. If no-load frequency has changed because of
5. 5. Check output voltage. See Section 8. Genera-

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.