Generator Maintenance Checklist: Keep Your Backup Power Ready
Updated February 2026 • 7 min read
Your generator sits idle most of the time—but when you need it, it MUST work. Here's the maintenance checklist our factory-trained technicians use.
Weekly: Exercise Your Generator
Modern generators run automatic weekly exercise cycles. Verify yours is set to run 15-20 minutes weekly. This:
- Lubricates internal components
- Charges the battery
- Burns off moisture
- Verifies the system works
Monthly: Visual Inspection
- ☐ Check for oil leaks around the unit
- ☐ Look for rodent nests or debris
- ☐ Verify exhaust is clear
- ☐ Check coolant level (liquid-cooled units)
- ☐ Inspect battery terminals for corrosion
- ☐ Clear vegetation within 3 feet
Annual: Professional Service
Once per year, have a certified technician perform:
- ☐ Oil and filter change
- ☐ Air filter replacement
- ☐ Spark plug inspection/replacement
- ☐ Battery load test
- ☐ Transfer switch test
- ☐ Fuel system inspection
- ☐ Electrical connections check
- ☐ Full load test
- ☐ Software/firmware updates
Every 2-3 Years
- Replace spark plugs
- Replace battery (typically 3-year lifespan)
- Coolant flush (liquid-cooled units)
Warning Signs to Watch For
- Hard starting: Battery or fuel system issue
- Unusual noises: Internal component wear
- Oil consumption: Possible seal failure
- Error codes: Check your app or display
- Fuel smell: Possible leak—call immediately
Why Maintenance Matters
Skipping maintenance is the #1 reason generators fail during outages. A well-maintained generator will:
- Last 20-30 years
- Start reliably every time
- Maintain warranty coverage
- Avoid costly emergency repairs
Schedule Your Annual Maintenance
Our factory-trained technicians service all major brands.