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Cummins/Onan — Service Procedure

For these Cummins/Onan models: 2.5 MAJB-1 R, 2.5 MAJB-53BR, 2.5 MAJB-53CR.

Applies to: Cummins Onan 2 5 Majb 1 R, Cummins Onan 2 5 Majb 53Br, Cummins Onan 2 5 Majb 53Cr

Procedure

  1. 3. Remove the load from the engine.
  2. 4. Turn the idle fuel adjustment out until the engine

Source: manual:933-0502 Onan MAJB Marine Genset Service manual (10-1993).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.