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Cummins/Onan — SYMPTOMS

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. The engine does not crank.
  2. 2. The engine cranks, but does not start.
  3. 3. The engine coolant temperature gauge indicates 220° F or more while the engine is running.
  4. 4. The engine shuts down due to high engine temperature or low coolant level.
  5. 5. The engine shuts down due to high exhaust temperatu

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.