Cummins/Onan P2400 / P3500 — Returning the Generator Set to Service
Maintenance
For the Cummins/Onan P2400 / P3500, from the Cummins/Onan service manual.
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Procedure
- Check the tag on the generator set to verify that oil viscosity is correct for the current ambient temperature. Add or change oil as necessary.
- Clean the air cleaner if dirty.
- Open the fuel valve.
- Start the generator set; initial start-up may be rough and smoky due to extra oil in the cylinder. Remove and clean the spark plug if necessary.
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.