Home Generator Maintenance Made Simple

Standby generators can be low maintenance, but because they are complex machines exposed to the elements, periodic upkeep helps ensure reliable performance when you need it most.

Here's a straightforward guide to home generator maintenance, helping you keep your machine prepared for any season or storm.

Start with Your Owner's Manual

Before attempting any maintenance, read and retain your owner's manual. It contains model-specific information vital for optimal operation and performance, including exact run-hour requirements and recommended fluids.

Generator Maintenance Essentials—Oil, Filters, and Plugs

Just like your car, your generator's engine requires regular care to function efficiently.

How to Change Oil in a Generator

Oil changes are the most crucial and common maintenance task for any standby generator and should be done annually.

• Pre-Change Check: Use the dipstick to check the oil level. If the oil is below the fill line or appears dark and thick, it's time for a change.
• Run-Time Check: If the generator runs for an extended period (such as 48 hours or the 100–200 hour limit outlined in your manual), allow it to cool, then check the oil and change it if needed.
• The Procedure: Locate the oil drain tube, loosen the wing nut, and drain the old oil into an approved container. Then use a funnel to add new oil through the designated oil fill tube.

Pro Tip: Consider using synthetic oil. It's designed for superior high- and low-temperature viscosity, meaning it performs better in cold starts and during operation in extreme heat.

Air Filter and Spark Plugs

Maintenance for these items is less frequent, typically every two to three years or when they appear visibly dirty.

• Spark Plugs: Because standby generators typically run on vapor gas (natural gas or propane), the spark plugs are less likely to foul out as quickly as they might in a gasoline engine. Installing new spark plugs after a few years helps keep the generator running in top form.
• Air Filter: If the filter is only slightly dirty, you can remove it, shake it against the ground to remove debris, and reinsert it. If it's heavily soiled after a few years, replace it with a new one.

Exterior Care and Component Checks

Routine exterior inspection protects your generator's engine and critical starting components, which are constantly exposed to the elements.

Keep the Vents and Enclosure Clear

• Debris: To ensure proper air intake and exhaust, keep the surrounding area clear of leaves, shrubs, snow buildup, and any other blockages.
• Landscaping Note: Avoid planting anything near the unit, especially on the exhaust side, as the exhaust gases can damage or kill vegetation growing too close.

Inspect and Maintain the Generator Battery

The generator battery is exposed to the elements, making corrosion on the terminals a common occurrence.

• Inspection: As part of regular maintenance, remove and inspect the battery terminals. Check the charge using a battery tester. Many modern generators will also alert you if the battery is discharged.
• Cleaning: If you notice corrosion, which can cause starting issues, clean it using a wire brush and baking soda (which helps dissolve the buildup) or a dedicated battery cleaning kit from an automotive store.

Smart Monitoring and Preparation

Part of being prepared is monitoring your machine remotely and ensuring adequate fuel.

• Fuel Assurance: If a long-term outage is expected, confirm that you have sufficient fuel—whether that's a natural gas supply or propane in the tank—to operate the generator.
• Connectivity: We recommend utilizing accessories, such as a Wi-Fi-enabled meter, to monitor your propane tank level. Many generators come with Wi-Fi or Ethernet connections, enabling you to remotely check the generator's status, whether you're at home or away.

By incorporating these maintenance checks into your annual home routine, you can help ensure reliable backup power for years to come.

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