Keeping Your Generator in Good Shape: Generator maintenance tips for longevity

Generator maintenance can be a lifesaver.

Many people make the mistake of leaving their generators untouched until an emergency strikes, often finding them inoperable when they're needed most.

Regular maintenance is crucial for keeping your generator reliable and extending its lifespan, which includes running it every 30 days and performing basic upkeep like oil changes and fuel management.

According to BigRentz, it’s recommended to change the oil after the first 30 hours of use and then every 100 hours to maintain optimal generator performance.

We understand that maintaining a generator might seem like a chore, but it's much simpler than dealing with a non-functioning unit during an emergency.

Proper care involves basic steps like reading the manual, using the right fuel, adding fuel stabilizer for storage, and performing periodic inspections. These small efforts can prevent major problems and ensure your generator starts reliably when you need it most.

In this guide, you’ll learn practical tips for extending the life of your generator, from oil changes and filter replacements to safe storage and emergency readiness, through the below topics:

Whether you rely on a portable or standby unit, these steps will help you keep your system in peak condition.

Generator maintenance tips for long-term performance

Regular maintenance is crucial for keeping generators running smoothly when you need them most. Proper care extends the life of your generator and ensures it performs reliably during power outages.

Routine oil changes

Oil changes are perhaps the most important maintenance task for any generator. We recommend checking oil levels before each use and changing the oil after every 50-60 hours of operation for portable generators. For standby generators, follow the schedule in your owner's manual, typically every 100-150 hours.

Fresh oil keeps the engine lubricated and prevents premature wear. When changing oil, make sure the generator has cooled completely. Remove the oil fill cap and drain plug, allowing old oil to drain into an appropriate container.

Always use the oil type specified in your owner's manual. Most portable generators require SAE 10W-30 oil, but this can vary by model and operating temperature. After refilling, run the generator briefly to ensure proper oil circulation.

How to clean and replace your generator air filter

Clean air filters are essential for generator efficiency and longevity. A clogged filter restricts airflow, causing poor performance and increased fuel consumption.

We suggest inspecting the air filter every 25 hours of operation. For portable generators, this simple check can prevent serious engine problems. Locate the air filter housing (typically on the side of the engine) and remove the cover.

If your generator has a foam filter, wash it with soap and water, then let it dry completely before adding a small amount of clean engine oil. Paper filters should be replaced rather than cleaned.

Most manufacturers recommend replacing air filters every 200 hours or at the beginning of each season. This small investment prevents expensive engine damage.

Inspecting and replacing spark plugs

Spark plugs are critical components that ignite the fuel mixture in your generator. Faulty spark plugs can cause hard starting, rough running, and poor fuel economy.

We recommend inspecting spark plugs every 100 hours of operation. Look for signs of wear, including deposits, corrosion, or damaged electrodes. The insulator should be light tan or gray in color.

To check spark plugs, first disconnect the spark plug wire and use a spark plug socket to remove it. Measure the gap with a feeler gauge and adjust if necessary according to your owner's manual specifications.

Replace spark plugs every 200 hours or once per season. Always use the manufacturer's recommended spark plug type. Hand-tighten the new plug before finishing with the socket wrench to avoid damaging the threads.

Generator inspection checklist: What to check monthly

Regular inspections help identify small problems before they become costly failures. A monthly generator checkup only takes a few minutes and ensures your system is ready for emergencies.

Start by checking the oil level and topping it off if needed. Inspect the air filter for buildup or clogging, especially in dusty environments. Look over the spark plug wire and connector to ensure they’re secure and free of corrosion.

Next, examine the fuel level and consider the age of the gasoline. If it’s been sitting for over a month without a stabilizer, it should be replaced. If your unit has a battery, test its charge and inspect for terminal corrosion.

It’s also important to run the generator under load for 20 to 30 minutes. This allows you to monitor for unusual noises, vibrations, or starting issues. Completing this checklist monthly helps ensure your generator is ready for any outage.

Generator storage and fuel care best practices

Storing your generator correctly and managing its fuel properly can significantly extend its lifespan and ensure it works when you need it most. Good practices prevent corrosion, fuel degradation, and mechanical problems.

Using fuel stabilizers

Fuel stabilizers are essential for maintaining generator fuel quality, especially during long periods of inactivity. When gasoline sits unused for more than 30 days, it begins to deteriorate and can form gummy deposits that clog fuel lines and carburetors.

Adding a quality fuel stabilizer to fresh fuel can extend its shelf life up to 12-24 months, depending on the product used. We recommend measuring the stabilizer precisely according to manufacturer instructions for optimal results.

For portable generators, treat the fuel before filling the tank. For standby generators with larger external tanks, add stabilizer directly to the storage tank before refilling.

Always run the generator for 10-15 minutes after adding stabilized fuel to ensure it circulates through the entire fuel system.

Safe storage procedures

Storing your generator properly protects it from environmental damage and ensures reliable backup power when needed. Always store generators in a cool, dry place that's sheltered from rain, snow, and excessive humidity.

For portable generators, invest in a dedicated storage cover to keep dust and pests away. Never store your generator with fuel in the tank for extended periods unless you've added stabilizer.

Keep the storage area well-ventilated to prevent fuel vapor buildup. Maintain a minimum 3-foot clearance from combustible materials for safety.

Before long-term storage, we recommend:

Running the generator until the fuel system is empty
Changing the oil while the engine is warm
Removing the spark plug and putting a tablespoon of oil in the cylinder
Cleaning all exterior surfaces

For standby generators, schedule professional maintenance before and after long inactive periods.

What is a generator fixture and when is it needed?

A generator fixture refers to the permanent or semi-permanent components that allow a generator to be safely and securely installed in a fixed location. This includes items like concrete mounting pads, steel brackets, transfer switches, conduit systems, and weather-resistant enclosures.

Fixtures are most commonly associated with standby generators, which are designed for automatic operation during power outages. In these setups, a fixture anchors the generator in place, connects it to the home’s electrical panel through a transfer switch, and ensures proper exhaust ventilation and code compliance.

You’ll typically need a fixture if your generator will be permanently installed outdoors, especially in areas with permitting requirements or severe weather exposure. Some municipalities also require anchoring for wind or seismic safety. In these cases, a licensed electrician or installer can determine the right fixture setup based on your home’s layout and local code.

Generator safety tips every homeowner should know

Generator safety is essential to protect your health and prevent accidents. Safe operation means following proper procedures for ventilation, electrical connections, and exhaust management.

Preventing carbon monoxide poisoning

Carbon monoxide (CO) is an invisible, odorless gas that can be deadly. Never operate generators indoors, including garages, basements, or enclosed porches.

We recommend placing your generator at least 20 feet away from any doors, windows, or vents. This distance helps prevent exhaust from entering your home or building.

Install carbon monoxide detectors in your home if you use a generator. Test these detectors regularly to ensure they're working properly.

During storms or emergencies, many people make the mistake of placing generators too close to their homes. Remember that even partially enclosed spaces can trap deadly gases.

Signs of CO poisoning include headache, dizziness, weakness, upset stomach, chest pain, and confusion. If you experience these symptoms, get fresh air immediately and seek medical attention.

Avoiding electrocution hazards

Keep your generator dry at all times. Use a canopy or generator tent that allows for proper ventilation while protecting it from rain and moisture.

Never operate a generator with wet hands or while standing in water. Even small amounts of moisture can create serious shock hazards.

Use properly grounded extension cords that are rated for outdoor use. Check cords regularly for damage, fraying, or exposed wires.

Important safety equipment includes:

Properly rated circuit breakers
Ground fault circuit interrupters (GFCIs)
Transfer switches for home connections

Never plug your generator directly into a wall outlet. This dangerous practice called "backfeeding" can electrocute utility workers and neighbors.

Safe exhaust practices

Position your generator so the exhaust points away from your home and any nearby buildings. Hot exhaust can damage materials and potentially cause fires.

Maintain a clear space of 3-4 feet on all sides of your generator to ensure proper airflow and cooling. This helps prevent overheating and exhaust buildup.

Check the exhaust system regularly for leaks or damage. Even small cracks can allow carbon monoxide to escape in dangerous concentrations.

Let your generator cool completely before refueling. Hot engine parts or exhaust could ignite fuel, causing dangerous fires.

Be aware of wind direction when operating your generator. Strong winds can blow exhaust toward building openings even when the generator is properly positioned.

How to prepare your generator for emergencies

Being ready for power outages requires more than just owning a generator. Proper preparation ensures your backup power system works when you need it most.

Testing during power outages

Regular testing is crucial for emergency readiness. We recommend running your generator for 20-30 minutes every month to ensure it starts and operates properly.

When testing your generator:

Check for unusual noises or vibrations that could indicate problems
Monitor oil and fuel levels before and after testing
Verify all connected appliances work correctly
Test automatic transfer switches if your system has them

Don't wait until a storm is forecasted. Power outages can happen without warning, and discovering generator problems during an emergency is too late.

Keep a testing log to track performance over time. This helps identify patterns that might indicate developing issues before they become serious problems.

Why reading your generator manual matters

Your generator's owner's manual contains vital information specific to your model. We strongly recommend keeping it in an accessible location.

The manual includes:

Startup and shutdown procedures that may differ between models
Maintenance schedules tailored to your specific generator
Troubleshooting guides for common problems
Safety warnings unique to your equipment

Many manufacturers now offer digital copies of manuals online. Download a copy to your phone or tablet for easy reference during power outages when internet access may be unavailable.

Create a quick-reference sheet with the most important procedures from the manual. This one-page guide can save precious time during an emergency when stress levels are high.

Conclusion

Keeping your generator in top condition isn't complicated, but it does require consistency. Routine maintenance like oil changes, spark plug replacements, and air filter care helps prevent breakdowns and extends the life of your unit.

Proper fuel management, safe storage practices, and monthly test runs are equally important to ensure your generator will start when it matters most.

Beyond regular upkeep, understanding generator safety, such as preventing carbon monoxide exposure and avoiding electrical hazards, is essential for protecting your home and family.

Whether you use a portable generator for occasional needs or a standby system for whole-home coverage, staying proactive with inspections and maintenance is your best defense against failure.

If you're unsure whether your system is ready or need help implementing a full generator inspection checklist, call Mountain West. We offer expert generator maintenance services to keep your power supply reliable all year long.