Generator Troubleshooting: What’s the First Thing You Check When It Won’t Start?

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Hey everyone,
Ran into an issue recently where a generator wouldn’t start, and it got me thinking.. what’s your go-to troubleshooting process when a genset acts up?
In my case, the unit had power but wouldn’t crank. Checked the basics first:
  • Battery voltage (looked okay at first glance)
  • Fuel level and lines
  • Air filter condition
Turned out to be a weak battery under load, not obvious until tested properly.
Made me realize how easy it is to overlook simple things before diving deeper.
For those of you working with generators regularly, especially on job sites or rentals:

-What’s the first thing you check?
-Any common issues you see over and over?
-Ever had a “simple fix” that turned into something bigger (or vice versa)?

Also curious if anyone has a solid checklist they follow in the field, trying to tighten up my troubleshooting workflow.

Would be great to hear your experiences.
 
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