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Cummins/Onan — Service Procedure

A Cummins/Onan service procedure — check it applies to your exact model before use.

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Before you start

  • precise pressure regulation of the fuel becomes.
  • ) Do not permit any Hame, cigarette,

Procedure

  1. Set main power mixture to position shown in
  2. Turn idle screw in fully clockwise.
  3. Turn idle screw out 2-1/2 to 3-1/2 turns coun-
  4. Connect or turn on fuel supply to regulator.
  5. Check (smell) for propane leaks.
  6. Start engine—it should start within 20 seconds if
  7. Disconnect fuel line at carburetor.
  8. Momentarily, press primer button; you should
  9. Look for one or more shutoff devices.
  10. On vacuum operated shutoff valve systems, close
  11. Run new engine at least ten hours at normal

Source: manual:927-0754 Onan CCK-CCKA-CCKB (Spec A-J) Engine Service Manual (03-1986)L.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.