Is It OK To Wash a Lawn Mower? (Solved & Explained!)

There is no harm in washing your lawnmower. But you have to be careful not to let water into the engine. Otherwise, you may disrupt the functionality of the engine. In addition, it is not recommended to use pressurized water during washing. 

What Does Pressurised Water Do To A Lawnmower?

Pressurized water may cause some problems as it may enter the undercarriage of your lawnmower. If the inside of your lawnmower gets too wet it can cause damage to the mechanism.

You should allow your lawnmower to dry completely before using it, as it can wet the grass it picks up and wet grass can rot the metal parts of your machine. 

after-use and end-of-season cleaning are the best times for cleaning lawnmowers.

How to Clean Your Mower


  1. Before you start cleaning your lawnmower, make sure the engine is off. Your safety is more important than anything else.
  2. Before you begin, carefully read all safety precautions in your lawnmower’s manual. Then secure your lawnmower so that the base does not slip on a solid surface.
  3. Make sure your lawnmower is braked and ready to wash by removing the ignition key. Having the ignition of the lawnmower switch off eliminates the risk of sudden movement of the machine during cleaning. 
  4. Ensure that the blades of your lawnmower do not move.

After applying all these instructions, all that remains is to put on your cleaning clothes and gloves as you may get splashback. 

Access the underside of the mower deck

  1. You can reach the bottom of your lawnmower by raising the front. There should be a lever located on the machine that allows access.
  2. If you do not have a lever, then tilt your machine on its side. Remove any grass or large debris from the blades and continue cleaning. 

Scrape Off Dead Grass and Dirt

Use an iron or metal rod to scrape off the scraggly dried grass and any twigs.  We the area with a damp cloth first so that any debris that is dried or stuck comes away easier.

Do not use your hands. This can be dangerous, even if the machine is switched off. Mower blades are very sharp, you could risk injury if you dry to reach in my hand.

Thoroughly Clean Your Mower

  1. After scraping the dirt away, apply the appropriate detergent to the bottom of your lawnmower and wait for 15 minutes. 
  2. Wash the bottom of the machine with an electric washer or with a hose (not on the power setting) to remove all the dirt.
  3. leave your lawnmower in a dry sunny place to dry thoroughly before use.

To Clean the Tires

  1. You can wash the tires with a wet cloth and detergent. Rinse the detergent away after the tires have been cleaned.
  2. Tires benefit from a little elbow great and are not close to any dangerous parts so you should be okay to clean them by hand. 
  3. 2. If you do not wish to clean them by hand then use the hose with a little pressure to knock off any dirt or mud. Be careful not to allow the pressurized water to reach the undercarriage.

Why You Should Never Power Wash Your Mower?

Power washing is very effective for vehicle maintenance and cleaning, however, it isn’t suitable for lawnmowers.

High-pressure water can penetrate into your lawnmower and reach the engine, where the cables and gaskets are seated. Wetting your gaskets and cables can cause damage.

Water can cause your gaskets and metal parts to corrode if left wet for too long, and anything electrical can be damaged instantly upon contact with water.

How Often Should You Wash Your Lawn Mower?

Cleaning your lawnmower should be done at least twice a year, at the beginning and end of the season. 

Grasses trapped inside your lawnmower damage the undercarriage of your lawnmower if left to sit there over time. When the grass rots, it produces acid, causing the metal parts to rust over if left for too long.

Does a Lawn Mower Break If It Gets Wet?

If your lawnmower gets a little wet, it will not break. If it gets very wet, it won’t deteriorate completely if you allow it to dry out but could be damaged if left wet for too long.

If you have been careful not to allow any water into the engine and electronic components while washing, your lawnmower will work perfectly fine after it has dried.

Emptying the lawnmower of its gas and oil can speed up the drying process. This is why a lot of gardeners wait until the end of the season to wash their lawnmowers. They clean it as part of a yearly service, so they have a clean and newly oiled and gassed lawnmower waiting for them the following year.

Can a Lawn Mower Be Left Outsidein The Winter?

You should not leave your lawnmower outside in the winter. Otherwise, you may end up with a broken lawnmower. 

Although lawn mowers are built to tolerate short-term precipitation and cold weather, it is very unlikely that they will survive a harsh winter unscathed. During the winter is it best to leave your lawnmower somewhere dry and protected from the elements.

What is a Deck Wash?

Deck washing is the process of washing and cleaning the underside of your lawnmower. The underside can usually be accessed by lifting it with a lever. 

If you can not find a lever, you can turn your mower on its side, just make sure the machine is switched off before doing so.

How Do I Clean The Bottom of My Lawn Mower?

There are two methods for cleaning the bottom of your lawnmower. These methods vary depending on the size of your lawnmower. 

If you have a small lawnmower, you can tilt it on its side. If you have a large lawnmower it will probably be installed with a lever so you can access the mechanism.

Once you get access to the undercarriage, apply an effective detergent to the parts and allow it to sit for 15 minutes. This time frame allows the chemicals to get to work and saves you the effort of scrubbing.