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Diesel generator running in rainy weather

Want to know whether you can run a generator in rainy weather or not? Or how to use a generator in rainy weather? Then this blog post is for you. Let’s get started!

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If you’ve ever experienced an extended power outage, you know how frustrating it can be. A portable generator can be a lifesaver in these situations, providing much-needed power for lights and refrigerators.

But what if the weather turns bad? Can you still safely use a portable generator in the rain? The answer is yes, but there are a few things you need to keep in mind.

In this article, you’ll learn more about running your generator in wet weather and what can happen if you don’t take the proper precautions.

We examine whether rain can damage your generator, what happens when you get wet, and how to run and protect your generator in wet weather.

If you’re considering purchasing a portable generator & gensets, you must understand how to store and use your generator.

We’ll cover what you need to consider in this article. You’ll also find some helpful tips on storage, generator covers, and their proper placement.

Diesel generator placed on the ground at the construction site

Will rain damage generators?

Depending on the type of generator, you might be able to run it in the rain. For example, portable generators often have weather shields that protect the engine and electrical components from the elements.

However, running a generator in wet conditions can still be dangerous. Slips and falls are common hazards, and electrocution is a severe risk. If you need to use your generator during a rainstorm, take the following precautions to stay safe.

Precautions when using a portable generator in the rain

Install the generator on a dry, level surface. If possible, place it under a shelter to keep it dry.

If you use your generator outdoors, ensure it is at least 20 feet away from any structures. This will help keep smoke from seeping into your home and causing deadly carbon monoxide poisoning.

Before running your generator, read the owner’s manual to ensure safe operation in wet weather. Some models are unsuitable for use in the rain and may be damaged by exposure to moisture.

Also, only connect equipment and cords that are suitable for outdoor use. Do not plug generators into electrical outlets in your home as this can create fatal electrical hazards such as electrical “backfeed” that puts anyone touching the outlet at risk of electrocution.

Plus, it can stress your generator and potentially cause damage to your home’s electrical system. If you must use a generator during a power outage, consult an electrician before connecting it to your home wiring.

generator wet

What happens if the generator gets wet?

A wet generator can damage the engine, so it’s essential to keep it dry. If the generator is outdoors, ensure it is on a dry, level surface. If it gets wet, you can try drying it with a towel.

If the ground is wet, you can use blocks or planks to lift the generator off. If the generator is inside an enclosure, make sure the enclosure is dry and well-ventilated. If the generator gets wet and you can’t wipe it dry, it may need to be replaced.

The threat of severe weather is always an issue for anyone who relies on a portable generator. After all, if a generator gets wet, it can be damaged and cause a significant power outage.

What should you do if you’re expecting rain?

The first step is to make sure your generator is properly covered. A generator cover will help protect it from the elements and prevent water from getting inside.

If possible, try to place the generator under some shelter to reduce the risk of exposure to rain further.

Also, checking your generator’s electrical components regularly is essential to ensure they’re dry and in good condition.

If any components get wet, they can short-circuit and cause extensive damage. Taking these precautions can help ensure your portable generator can withstand any storm.

Shed for portable generators to keep out the rain

How to protect a portable generator from the rain?

You can take steps to reduce the risk of severe weather causing you problems.

First, make sure your portable generator is properly grounded. This will help prevent electric shock. If you use a ground fault circuit interrupter (GFCI) or residual current device (RCD), test it regularly.

When running a portable generator indoors, ensure it is well-ventilated to avoid carbon monoxide poisoning. Remember never to refuel a running or overheating generator set. Always consult the owner’s manual before operating a portable generator.

Second, keep the generator dry. If it gets wet, it may short-circuit and cause a fire. Consider a generator tent or enclosure if you must use your generator in the rain.

They’re designed to protect your generator from the elements and can be found at most hardware stores. Alternatively, you can cover it with a tarp or other waterproof material.

Be sure to secure the cover so it doesn’t get blown away in the wind and rain. Taking these simple measures can help ensure your generator stays dry and safe during severe weather.

Beware of harmful fumes

Do not run portable generators at home. Exhaust fumes can be fatal. You must run the generator outside to provide adequate airflow to the generator.

There should be at least 5 feet (1.5 meters) of space between the generator and any doors, windows, or vents leading into your home.

Additionally, the area surrounding the generator should be cleared of flammable materials. We recommend keeping it at least 20 feet away from your residence. This will help prevent carbon monoxide poisoning.

Finally, ensure you have a generator rated for your needs. Overloading can damage the generator and put you at risk of an electrical fire. If in doubt, consult the owner’s manual or consult a qualified electrician.

Following these safety tips, you can use your portable generator in the rain without any issues.

Maintenance method of a generator after caught in the rain

Clean the surface of the engine to remove dirt. Then use metal cleaner or washing powder to remove oil from the surface of the engine.

Support one end of the engine so that the oil drain part of the oil pan is at the lowest position. Tighten the oil drain plug, pull out the oil dipstick, and let the water in the oil pan flow out by itself. Let the oil and water flow out when the oil flows out, and then screw on the oil drain plug.

Remove the generator air filter and the upper filter housing and the filter element. Clear the water from the filter. Clean all parts with metal cleaner or diesel oil. If the filter is made of plastic foam, wash it with detergent or soapy water. Then rinse with clean water, let dry, and dip in a decent amount of oil. If the filter element is made of paper, it should be replaced with a new one. After all filter parts are cleaned and dried, install them as required.

Remove the intake and exhaust pipes and muffler, and check whether the water is inside. Open the pressure reducer, crank the engine, and check whether water is discharged from the intake and exhaust ports. If water is removed, turn the crankshaft until all the water in the cylinder is discharged. Install the intake pipe, exhaust pipe, and muffler, add oil to the intake pipe, turn the crankshaft several times, and then install the air filter. If the diesel engine has been flooded for a long time and the flywheel is difficult to rotate, the cylinder liner and piston ring are rusted. They should be dismantled and cleaned and then reassembled. It should be replaced in time.

Remove the fuel tank and drain the oil and water in the tank. Check whether there is water in the fuel filter and oil pipe, and drain it, if any. Then clean the fuel tank and filter, install it according to the original point, connect the oil pipe, and add clean diesel oil into the fuel tank.

Drain the dirty water in the water tank and pipe, clean the pipe, and then add clean river water until the water floats. Turn on the throttle switch and start the diesel engine. After the diesel engine is started, pay attention to the rise of the oil level and listen to the abnormal sound of the diesel engine. After checking whether all parts are standard, run the diesel engine. When running sequentially, idle first, then medium speed, then high speed, and the running time is 5 minutes, respectively. After running in, stop the machine, drain the oil, add new oil, start the diesel engine, run it at medium speed for 5 minutes, and then it can be used usually.

The above method can restore the generator set to the best state and eliminate hidden dangers in later operations. Of course, as a reminder, if the generator set must be used outdoors, it is best to block the work at any time to prevent unnecessary losses caused by unexpected weather.


Portable generators can be lifesavers in an emergency, but it’s essential to know how to run generators to use them safely in wet conditions or rainy weather. Contact us today to find the best generator for you.

In this article, we look at the dangers of using a portable generator in the rain and provide some tips for running your generator safely.

You should now know how to use a generator safely and keep yourself safe during heavy rain and strong winds. How best to store them, should they be covered, and how far from your property should you store your generator?

Natural disasters, grid outages, and blackouts happen, so being prepared to keep yourself and your generator safe is critical. Maybe you’re also wondering: Can you run a generator in the snow?

Generator Running In Rainy FAQ

During storms, a portable generator ensures backup power, but it must be kept in a well-ventilated and protected area. Building a DIY enclosure out of wood or metal helps, but it must be moved easily. Avoid wet ground and use a surge protector. Keep the fuel tank full to ensure readiness. Secure your enclosure to prevent damage or loss in high winds or heavy rain.

Never leave a running generator unattended especially if you need to leave the area. If you must leave, disconnect all power sources or leave it with someone else who can safely operate it. Never refuel a running or hot generator to prevent explosions. Remember that portable generators emit dangerous carbon monoxide gas and it is important to ensure proper ventilation, placement, and purchase of a carbon monoxide detector. If you need to leave a running generator, turn it off first. When in doubt, always err on the side of caution and turn off the generator before leaving the area.

When using a portable generator, ensure it is at least 20 feet away from the building and in an open area for ventilation. The portable generator should be placed in a location where it can access natural cooling airflow and the power cord should be suitable for outdoor use. It is also vital to choose a level site with good drainage and protect the equipment from natural hazards and wet conditions. Consider using a generator tent, cover, or steel enclosure to prevent rain and snow damage, or provide additional security. Be sure to choose the correct size if using a cover and keep it away from any power cords to avoid danger.

Comparing portable and home backup generators, people often assume only the former is susceptible to water damage, but the latter can also fail when exposed to rainfall or snow – although they’re designed with a covering to protect them. Taking off that covering would result in the same failure that plagues portables. So, if you want 24/7 operation and reliability, make sure you have an enclosure or other protection for your portable generator. Regardless of a generator’s type or fuel source, shielding it from the elements is essential for its functionality and safety.

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