How Often Should Generators Be Serviced? A Guide to Keeping Your Power Reliable

Generators are the unsung heroes of homes, businesses, and industrial sites, kicking in when the power goes out and keeping everything running smoothly. But like any piece of machinery, they need regular care to stay reliable and efficient. So, how often should generators be serviced? The answer depends on the type of generator, how often it’s used, and its specific operating conditions.

In this guide, we’ll break down everything you need to know about generator servicing, from general timelines to specific maintenance tips, to help you keep your generator running like new.

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Why Regular Generator Servicing Is Essential

Before we dive into how often your generator should be serviced, let’s talk about why it matters.

• Prevent Breakdowns: Regular maintenance catches small issues before they turn into costly repairs.
• Improve Efficiency: A well-maintained generator runs more efficiently, saving you fuel and money.
• Extend Lifespan: Servicing extends the life of your generator, protecting your investment.
• Ensure Safety: Generators that aren’t serviced properly can pose risks like fuel leaks, electrical hazards, or carbon monoxide exposure.

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General Guidelines: How Often Should Generators Be Serviced?

The frequency of generator servicing depends on the type of generator and how often it’s used. Here are some general guidelines:

• Standby Generators (used during power outages): Service at least once a year or after every 200-250 hours of use.
• Portable Generators (used occasionally or for outdoor activities): Service after every 100 hours of use or at least once a year.
• Prime/Continuous Generators (used as the primary power source): Service after every 500 hours of use, with more frequent checks for heavy-duty operations.

Tip: Always refer to the manufacturer’s manual for specific service intervals, as different brands may have varying recommendations.

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Signs Your Generator Needs Servicing Sooner

While sticking to a maintenance schedule is important, there are times when your generator may need attention sooner. Watch for these warning signs:

• Difficulty Starting: If your generator struggles to start, it could indicate battery issues or fuel problems.
• Unusual Noises or Vibrations: Loud knocking or vibrations can signal loose components or internal wear.
• Excessive Smoke: Black, blue, or white smoke from the exhaust could indicate fuel, oil, or coolant issues.
• Reduced Power Output: If the generator isn’t supplying the usual amount of power, it’s time for a check-up.
• Frequent Shutdowns: Unexpected shutdowns could point to electrical faults or overheating.

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What Does Generator Servicing Include?

A typical generator service involves a thorough inspection and maintenance of key components. Here’s what’s usually covered:

• Oil and Filter Changes: Dirty oil can cause engine damage. Regular oil changes keep the engine lubricated and running smoothly.
• Air Filter Cleaning/Replacement: Clean air filters ensure proper airflow and prevent debris from entering the engine.
• Fuel System Inspection: Checking for fuel leaks, replacing fuel filters, and ensuring the fuel is clean and fresh.
• Battery Check: Testing battery voltage and cleaning terminals to ensure reliable starting.
• Coolant Level Check: Ensuring the cooling system works effectively to prevent overheating.
• Exhaust System Inspection: Checking for leaks or blockages in the exhaust system.
• Load Testing: Ensuring the generator can handle the power load it’s designed for.

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How to Maintain Your Generator Between Services

While professional servicing is key, there are simple steps you can take between appointments to keep your generator in top shape:

• Run It Regularly: Start your generator once a month and let it run for 10-15 minutes to keep parts lubricated and ensure it’s ready when needed.
• Keep It Clean: Wipe down the exterior and keep the area around your generator clear of debris.
• Check Fluid Levels: Regularly check oil, coolant, and fuel levels, especially before expected outages.
• Inspect for Wear and Tear: Look for signs of rust, leaks, or loose components.

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Do Different Generators Have Different Servicing Needs?

Yes! Different types of generators have different servicing requirements:

• Diesel Generators: Known for durability, but they still need regular fuel system checks and oil changes to stay efficient.
• Gas Generators: Require frequent spark plug and air filter inspections, especially if running on natural gas or LPG.
• Inverter Generators: Quieter and more fuel-efficient, but need regular battery checks and software updates if digital controls are involved.

Example: A diesel generator used for backup power may only need annual servicing, while a gas generator powering a food truck will need more frequent attention due to constant use.

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How Weather and Environment Affect Servicing Frequency

Brisbane’s climate and environmental factors can impact how often your generator needs servicing:

• Humid Conditions: Moisture can lead to rust and corrosion, especially in coastal areas.
• Dusty Environments: More frequent air filter cleaning is necessary if the generator operates in dusty or sandy areas.
• Temperature Extremes: High temperatures can strain the cooling system, requiring more frequent coolant checks.

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Can I Service My Generator Myself?

Basic maintenance like checking oil levels, cleaning the exterior, and inspecting for visible damage can be done at home. However, more complex servicing, such as load testing, electrical checks, and fuel system maintenance, should be left to professionals to ensure safety and compliance with manufacturer warranties.

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When Should You Call a Professional?

While routine checks can be done yourself, you should call a professional for:

• Annual Servicing: A professional technician will thoroughly inspect and service your generator to ensure peak performance.
• Major Repairs: Electrical faults, engine issues, or fuel system problems should always be handled by an expert.

After Prolonged Use: If your generator has been running continuously during an outage, it’s wise to schedule a check-up afterward.