Cummins/Onan — Adjust the governor controller as follows:

For these Cummins/Onan models: MCGBA, MCGCA, MCGDA, MCGDB, MCGGA, MDGDA, MDGDB, MDGDC, MDGDD.

Applies to: Cummins Onan Mcgba, Cummins Onan Mcgca, Cummins Onan Mcgda, Cummins Onan Mcgdb, Cummins Onan Mcgga, Cummins Onan Mdgda, Cummins Onan Mdgdb, Cummins Onan Mdgdc, Cummins Onan Mdgdd

Procedure

1. 1. Push both selector switches (S1, S2) on the
2. 2. Note that the pots (potentiometers) on the con-
3. 3. If a remote speed pot is used, set it at its mid-
4. 4. Start the set and adjust the Speed pot to obtain
5. 5. Disconnect the load and turn the GAIN pot to
6. 100 percent or until operation becomes unsta-
7. 6. Adjust D as in Step 5.
8. 7. Adjust I as in Step 5.
9. 8. Readjust Speed if necessary.
10. 9. Manually push the throttle to the minimum

Source: manual:960-0151B Onan MCGBA CA GA DA DB DA DB DC DD Operators Manual (6-2000) .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.