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Cummins/Onan — Service Procedure

For these Cummins/Onan models: 6JB, 7.5JB, J-Series (2-cylinder), J-Series (4-cylinder), JC.

Applies to: Cummins Onan 6Jb, Cummins Onan 7 5Jb

Procedure

  1. Check the fuel tank and see that the shut-off valve is
  2. Remove the fuel line from the pump outlet and crank the

Source: manual:967-0500 Onan JB JC (spec A-T) Genset Service manual MAGNECITER END (11-1971).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.