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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. 4. Control fuse (Fl) is open.
  2. 5. Connect a voltmeter across the

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.