Generator Maintenance Services
in Gallatin, TN
A whole house standby generator that isn't maintained will fail the moment you need it most. Annual preventative maintenance — including full synthetic oil changes, spark plug service, digital battery load testing, ATS load transfer simulation, and warranty validation — ensures your Generac or Kohler generator starts flawlessly during Middle Tennessee storm blackouts.
Why Annual Generator Maintenance Is Essential in Middle Tennessee
Middle Tennessee's power grid is regularly challenged by severe spring thunderstorms, tornado outbreaks, and winter ice storms. When the grid drops, your standby generator must instantly start and carry heavy electrical loads for days. Generators that sit idle between weekly exercise runs accumulate moisture condensation in engine oil, develop battery sulfation, and experience fuel delivery degradation — none of which show up during a brief 10-minute unloaded exercise run.
We recommend annual preventative maintenance for all residential standby generators (or service after every 100 hours of continuous runtime during an extended outage). Both Generac and Kohler require documented annual service to keep their 5-year and 10-year factory warranties in good standing.
Generator Maintenance Pricing & Service Plans in Gallatin
We offer transparent, upfront maintenance pricing for Generac, Kohler, Briggs & Stratton, and Cummins generators across Sumner County:
Residential Standby Generator Maintenance Pricing
| Service Tier | Coverage & Scope | Frequency | Price |
|---|---|---|---|
| Standard Annual Tune-Up | Synthetic oil & filter change, spark plugs, air filter, battery load test, ATS test | 1x / Year | $180 – $275 |
| Comprehensive Pro Service Plan | Standard tune-up + valve lash adjustment, controller firmware updates, priority emergency dispatch | 1x / Year (Full) | $295 – $385 |
| Post-Storm Extended Run Service | Oil change, filter replacement, spark plug check after 100+ hours of continuous run time | As Needed | $165 – $240 |
| Generator Repair & Diagnostics | Fault code reading, ATS coil repair, starter motor replacement, AVR replacement | On Demand | $150 – $450 (typical repair) |
Our 12-Point Preventative Maintenance Checklist
- Full-Synthetic Oil & OEM Filter Change: Draining degraded oil and installing fresh 5W-30 full synthetic motor oil and genuine OEM oil filters (Generac 90mm or Kohler PRO).
- Air Intake Filter Service: Replacing dusty or restricted air filter elements to ensure optimum air-fuel ratio and fuel efficiency.
- Spark Plug Inspection & Replacement: Installing new champion/NGK spark plugs gapped to exact manufacturer clearances for fast ignition.
- Digital Battery Load & Float Charge Test: Testing Cold Cranking Amps (CCA) and verifying the onboard smart battery charger maintains 13.5V–13.8V float voltage.
- Valve Lash Clearance Inspection: Checking intake and exhaust valve clearances on Generac G-Force and Kohler Command PRO engines to prevent hard starting and backfiring.
- Simulated Outage & ATS Load Test: Simulating an actual utility power drop to confirm the Automatic Transfer Switch switches over smoothly under real household load.
- Voltage & Frequency Output Verification: Measuring 240V/120V output and precise 60 Hz (±0.5 Hz) frequency under load to protect sensitive electronics.
- Gas Fuel Pressure & Regulator Check: Inspecting fuel solenoid seals and measuring gas water-column (WC) pressure for natural gas or propane.
- Enclosure & Exhaust Integrity: Cleaning debris, checking vibration mounts, inspecting exhaust silencers, and ensuring proper 5-foot clearance from building openings.
- Firmware & Mobile Link App Check: Updating controller firmware and confirming Wi-Fi/cellular communication status.
Our Maintenance Services
Full Synthetic Lubrication
Premium synthetic oils formulated for extreme summer heat and sub-zero winter cold startup protection in Middle Tennessee.
Battery Health & Charger Diagnostics
Proactive battery replacement before dead cells cause a no-start failure during an unexpected storm blackout.
Live ATS Transfer Testing
Confirming your Automatic Transfer Switch mechanically engages and restores power to all critical household circuits in under 15 seconds.
Documented Warranty Compliance
Providing written service reports and maintenance logs to validate your Generac and Kohler factory warranties.