Cummins/Onan — Troubleshoot - Genset Cranks But Will Not Start
Testing & diagnosis · Fuel / starting system
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Check fuel supply
- Check fuel from fuel pump
- Check glowplug relay
- Check glowplugs
- Check stop solenoid operation
- Check compression
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.