how to winterize a pressure washer

Winter is coming, and with it comes the cold, wet weather that can wreak havoc on your pressure washer to prevent it you should know how to winterize a pressure washer.

If you want to keep your equipment in good condition, then there are some steps you need to take before winter arrives. This means that we have to prepare our pressure washers from the harsh conditions they might be exposed to.

How To Winterize A Pressure Washer?

It would be best always to have a spare pressure washer hose available when the first one freezes up or cracks due to being exposed to freezing temperatures. Keep your gas tank full so that fuel does not freeze and cause rusting of metal components inside the tank.

Also, make sure all of the oil has been drained from the engine before storage- this will prevent any oil from solidifying in vital parts like gears and bearings, which will lead to them becoming unusable during a future start-up attempt. Let’s talk in detail about winterizing the pressure washer.

Winterizing a Petrol Pressure Washer

Winterizing a pressure washer begins with draining all of the water and replacing any worn out parts. To get a petrol pressure washer ready for winter, you should first winterize the engine. Then turn on the water and check if it’s working as well as your desired setting are. You should winterize both engine and pump of the unit to protect from any cracks.

  • Ensure the water supply is off
  • Drain the water from inside the engine with a garden hose.
  • Now remove the hose from a pressure washer.
  • Fill a bucket with fresh water and run it through the detergent tube to clean out all the old dirt from a pressure washer.
  • You should also ensure no kinks or cracks in your hoses before storing them away for the season.
  • There should be no water left inside the machine to maintain its metal casing from damage. 
  • To prevent rust from forming in the inner parts, add one little bit of oil into the hole inside the spark plug.
  • Use your hands to shake the engine back and forth for a couple of seconds.
  • It’s time to protect the pressure washer is by storing it in a safe and dry place in the winter season.

Winterizing The Engine of a Petrol Pressure Washer

Pressure washer motors are made to work in a wide range of temperatures. That being said, many people have found that their pressure washer’s performance decreases as the temps drop below freezing and then it stops working altogether when the temperature drops to about 14 degrees Fahrenheit. Below are the steps of keeping the engine safe and secure during the winter season.

  • Drain all gas from the tank and put a fuel stabilizer in it about one ounce per gallon.
  • Pour the mixture into the pressure washer’s engine and run it for 5 minutes to stabilize the fuel.
  • Remember, the fuel can clog up or freeze your jet lines when storing your device during the winter months, so make sure this doesn’t happen.
  • To winterize a pressure washer, store it in a dry spot with as little debris and dust as possible.


Winterizing a pressure washer is an important step to protect your unit and ensure it’s ready for the next season. Drain all the water inside, lubricate any internal parts with oil (particularly around where the pump meets metal), and store in a dry place until you need it again.

This process will help keep corrosion from building up on your washer and prevent rusting or other damages that can happen when left unused during the winter months. Follow these simple steps, and you’ll be on your way to having an efficient unit that will last longer than ever before.