Generator Care Guide

A generator is built to provide reliable power when you need it most. With the right care and regular maintenance, you can help keep it performing at its best for longer.

From checking fluid levels and keeping the generator clean to following the recommended service schedule, a little preventative maintenance can go a long way. Many modern generators also include features designed to make operation and maintenance easier, but there are still a few important checks every generator owner should make.

Read on for our guide to keeping your generator in great working condition.

How to Maintain and Take Care of a Generator

Good generator maintenance starts before you even switch it on. Choosing the right generator for your requirements is essential, as consistently overloading a generator can place unnecessary strain on the engine and electrical components.

Before purchasing, make sure the generator has enough rated wattage to safely power the equipment you need. When using your generator, keep an eye on the power being drawn and check the requirements of any new appliance before connecting it.

Day-to-day generator care is relatively straightforward. Always use the correct fuel and engine oil for your model, and regularly check the fuel and oil levels. Keep an eye out for signs of leaks, damage or unusual operation, and deal with any issues before they become more serious.

The surface your generator is operating on is also important. Excessive movement and vibration can put additional stress on components, so always operate your generator on a firm, level surface. Where appropriate, a generator with an anti-vibration frame can provide additional stability during operation.

Fuel Storage and Generator Care

Fuel can deteriorate over time, particularly when a generator is left unused for extended periods. Old or contaminated fuel can cause starting and running problems and may contribute to deposits within the fuel system.

If your generator is going to be stored for an extended period, follow the manufacturer's recommendations for fuel storage and whether the tank and fuel system should be drained. Always store fuel safely and use fresh fuel that meets the requirements specified for your generator.

Preventative Maintenance for Generators

Preventative maintenance helps protect your generator between services and can reduce the risk of problems when you need it most.

One of the simplest ways to protect your generator is to keep it clean and covered when it is not in use. Dust, dirt and moisture can build up over time and affect components, particularly if the generator is stored outdoors.

A suitable weatherproof generator cover can help protect your generator from dust, dirt and the elements when it is being stored.

It's also worth keeping an adequate supply of the correct fuel available. Running out of fuel will bring your generator to a stop, so having a suitable reserve can be particularly useful during power cuts, on worksites or when you're away from mains power.

Exercise Your Generator

If your generator is primarily kept for emergencies, don't wait until the next power cut to find out whether it still works.

Running your generator periodically, in accordance with the manufacturer's recommendations, helps confirm that it starts and operates correctly. This also gives you an opportunity to identify issues such as low fluid levels, battery problems, fuel deterioration or other faults before you actually need the generator.

Always follow the manufacturer's instructions for how frequently and for how long your generator should be operated.

How Often Should You Change Generator Oil?

Oil changes are an important part of generator maintenance, but the correct interval will depend on the make, model, engine and operating conditions.

Many generators require an initial oil change after the first few hours of operation, followed by regular oil changes at specified service intervals. Generators that are used frequently, operated under heavy loads or exposed to high temperatures or dusty environments may require more frequent maintenance.

Always check your generator's owner's manual for the recommended oil type and service interval.

Modern generators, including many dual-fuel models, are designed with efficiency and ease of use in mind, but they still require regular servicing and oil changes to keep the engine operating correctly.

Generator Maintenance Tips

Regular maintenance doesn't have to be complicated. The key is to follow your generator manufacturer's maintenance schedule and carry out a few simple checks between services.

Never exceed your generator's rated capacity.
Check the oil and fuel levels before use.
Use only the correct fuel and oil specified for your generator.
Keep air intakes, cooling areas and the exhaust clear of debris.
Check for signs of leaks, damage or unusual vibration.
Change the oil and filters at the recommended service intervals.
Keep the generator clean and dry when not in use.
Store your generator correctly and use a suitable cover where appropriate.
If your generator is rarely used, run it periodically according to the manufacturer's recommendations.
Follow the manufacturer's servicing and storage instructions.

Generator Maintenance Timeline

Your generator's maintenance schedule will vary depending on the make and model, so always refer to the owner's manual for the correct intervals.

The following provides a general guide to the types of checks that may be required.

Before Each Use

Check the engine oil level.
Check the fuel level and condition.
Inspect the generator for leaks, damage or loose components.
Make sure the air intake and cooling areas are free from debris.
Check that the exhaust area is clear.
For dual-fuel models, inspect the LPG hose and connections for signs of damage or leaks.

After the First 5 Hours

Change the engine oil where specified by the manufacturer.
Check the generator for loose components or any signs of abnormal operation.

Every 50–100 Hours or Annually

Depending on your model and usage:

Change the engine oil.
Inspect or replace the air filter.
Inspect and clean the spark plug.
Clean the spark arrestor where fitted.
Inspect and clean the fuel system components as recommended.
Check for loose, worn or damaged components.

Heavy loads, frequent use and demanding operating environments may require more frequent servicing.

Every 250 Hours or Every 2 Years

Where specified by the manufacturer:

Clean the combustion chamber.
Check and adjust valve clearance.
Carry out any additional engine servicing recommended for your model.

Every 3 Years

Depending on the generator and its operating conditions:

Inspect and replace the fuel line if required.
For dual-fuel models, inspect and replace the LPG hose if required.
Check other fuel-system components for signs of ageing or deterioration.

Always use your generator's owner's manual as the final reference for maintenance intervals and replacement parts. Following the correct maintenance schedule will help keep your generator ready to deliver reliable power when you need it.