Cummins/Onan — Starting - Manual Start
Operation · Engine
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Prime engine before starting.
- Pull choke control about 3/4 closed or as necessary.
- Pull start rope with a fast steady pull.
- Do not jerk or let rope snap back.
- Adjust choke gradually to fully open as engine warms.
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.