August 22, 2025
How Often Do I Need To Maintain My Generac Generator?
A Generac generator is a great investment for reliable backup power. As with any hardworking machine, it needs regular maintenance to stay in top shape. Skipping routine service can lead to unexpected breakdowns, reduced efficiency, or even total failure when you need it most.
So, how often should you service your Generac generator? The answer depends on whether you have a portable or standby model. Here is the recommended Generac generator maintenance schedule, what servicing involves, and who should handle the upkeep.

Portable Generac Generator Upkeep Frequency
Portable generators provide power on camping trips, at job sites, and during power outages. Because they run on gasoline or diesel, regular maintenance is necessary to keep them reliable:
- First oil change: After the initial 20 to 30 hours of operation, change the engine oil. This removes any debris left behind from the manufacturing process.
- Regular oil changes: After the first change, plan to replace the oil every 100 hours of use or once a year, whichever comes first.
- Spark plug inspection: Inspect the spark plug every 100 hours of use or once a year.
- Air filter maintenance: A clogged air filter reduces efficiency. Clean or replace it after 200 hours of use or once a year.
- Valve clearance check: Inspect and adjust the valve clearance every 300 hours or once a year to ensure proper engine performance and longevity.
- Fuel system check: Gasoline breaks down over time. If the generator sits unused for long periods, use a fuel stabilizer or drain the tank.
While you can complete many of these tasks yourself, always consult the user manual for model-specific guidance. If you’re not inclined to get your hands dirty, professional technicians are always ready to assist.
Standby Generac Generator Service Intervals
Unlike portable models, standby generators are permanent installations that kick on automatically during a power outage. Generac systems run weekly self-tests, but they still require routine maintenance:
- Break-in maintenance: After the first 25 hours of operation, perform an oil change and valve adjustment. This initial service sets the foundation for longevity.
- Schedule A maintenance: Conduct a comprehensive check every two years or after 200 hours of use. A yellow maintenance alert should display on the control panel when the recommended service interval has been reached. Schedule A maintenance for Generac generators includes an oil change and battery inspection. Other steps like replacing the air filter, inspecting the oil lines, and ensuring proper ventilation may be performed as needed.
- Battery replacement: Even if your generator doesn’t see much use, replace the battery every two to three years to prevent failure during an outage.
Given the complexity of standby generators, it’s advisable to have this generator maintenance checklist performed by a certified professional.
Partner with Seidel Electric Inc.
To keep your Generac generator in peak condition, turn to Seidel Electric Inc. We have served the Tri-State Area with dedication and expertise since 1944. As a Certified Select Generac PowerPRO Dealer, we provide top-notch maintenance services and genuine replacement parts. Don’t wait for the next power outage to catch you off-guard—contact us today to schedule Generac generator maintenance.