Are you supposed to wash your lawn mower?

Author: Prof. Brant Barton  |  Last update: Sunday, March 29, 2026

So yes, you can and should clean your mower regularly. While some parts of the mower benefit from a thorough cleaning and can stand to get wet, others won't react well to lingering water. That's why it's important to know the right procedure for cleaning your lawn mower, whatever model it may be.

Is it okay to hose off your lawn mower?

It is generally not recommended to wash your lawnmower with a hose, especially if it's a gas-powered lawnmower, for several reasons: Electrical Components: Many lawnmowers, especially electric ones, have electrical components, such as the motor and wiring, that can be damaged by water. Water and electricity do not.

Is it OK for lawn mowers to get wet?

Yes, as long as you don't have water in fuel. On electric mowers as long as the motor and switches are dry. Battery powered mowers for the most part are made so they shed rain and will work just fine.

Should you clean the underside of lawn mower?

The underside of mower deck should be cleaned after each use, as grass clippings, leaves, dirt, and other debris will accumulate. This accumulation is undesirable; it will promote rust and corrosion.

How often should you wash your lawn mower deck?

We recommend cleaning your deck as part of your midsummer mower maintenance routine, and you generally shouldn't need to do it more often than two to three times a year.

How to Clean a Lawn Mower the Right Way

What keeps grass from sticking under a mower deck?

Mower decks often have an enamel paint coating that helps prevent grass clippings from sticking. But over time, this paint can wear out. You can refresh the coating with other lubricants, like non-stick cooking spray, or use a lawn mower paint available at your local hardware or home improvement store.

Can you spray the bottom of a lawn mower with water?

For easier cleaning, look for mowers that include a “deck wash” or “deck cleanout” feature. With this feature, you can simply attach your garden hose to a port on top of the cutting deck, and the water will pass through a deck adapter to spray the mower's underside.

Is it OK to lay a lawn mower on its side?

If the carburetor is facing downward, oil will likely make its way out of the breather tube that connects the crankcase and the air filter box, and you'll end up with major oil leaks. We recommend tipping your equipment straight back with handles facing down.

Does mowing wet grass dull mower blades?

Wet clippings stick to the underside of the mower deck, increasing the need for frequent cleanings, which can be dangerous if done improperly. The constant exposure to moisture can also dull mower blades faster and lead to rust, reducing cutting efficiency and requiring more frequent sharpening or replacement.

Is mowing wet grass bad for mower?

Clumps of wet grass not only hurt your lawn. They also clog your mower blades, slowing them down and making the engine work harder to turn them. Electric lawn mowers, which have less torque than gas mowers, often can't cut through wet grass at all for this reason.

Can you put water on lawn mower?

So yes, you can and should clean your mower regularly. While some parts of the mower benefit from a thorough cleaning and can stand to get wet, others won't react well to lingering water.

Is it okay to leave a lawn mower outside?

Gas mowers can be stored outside temporarily with fewer issues. For long-term storage, drain the fuel tank or add a stabiliser to prevent engine problems. Always cover the mower with a waterproof tarp to shield it from rain and snow. Electric mowers are more sensitive to water damage.

Will it hurt a lawn mower to get wet?

Your battery operated lawn mower shouldn't be exposed to water as it might suffer water ingress and damage over time. While mowing dewy grass occasionally won't matter, mowing the lawn in drizzle is a risk to the tool and the 56V lithium-ion battery, and damaged equipment creates a risk for the user too.

Is it OK to hose off your engine?

When satisfied, use a low-pressure spray to rinse down your engine. A standard garden hose is fine, but you can also use a pressure washer on the lowest setting. Work from back to front, thoroughly rinsing all surfaces and removing all the degreasers. Avoid spraying electrical components as much as possible.

Should you not mow your lawn?

Meanwhile, not mowing your lawn—or that city park—as frequently increases biodiversity, reduces pest species, and decreases overall lawn management costs.

Is it illegal to drive a lawnmower on the side of the road?

In most states, lawn mower driving laws consider a vehicle to be street legal if it has registration, license plates, proper lights, and turn signals. Unfortunately, most lawn mowers are not considered street legal because of those requirements.

Is it bad to pull a lawn mower backwards?

Danger! Another problem is safety. Mowing backwards means that the mower is moving towards your feet not away from them. One slip or hesitation and your foot could end up under the mower deck with potentially severe consequences.

Should you mow up and down or side to side?

If you're utilizing a push mower, then one of the most important tips to remember is to always cut side to side instead of up and down. If you mow up and down on a sloped hill, then you can risk severe injury. While mowing uphill, there is a possibility you may fall, allowing the mower to roll on top of you.

Should you wash your lawn mower?

Keeping your lawn mower clean can make a big difference in its efficiency and lifespan. Regular cleaning during the mowing season will not only prevent build-up, corrosion and diminished performance of your mower, but it can also minimize the spread of lawn diseases.

How often should you change lawn mower blades?

Blade erosion can happen over time due to yard debris, so be sure sure to inspect the thickness of the mower blade. For the average homeowner, a good rule of thumb is to replace your mower blades annually. Sharpening mower blades on a regular basis will prolong the life of your blades.

What is the best way to clean the underside of a lawn mower deck?

Use a garden hose or a pressure washer to loosen grass clumps on your deck's underside. If there's debris that can't be removed with water, use plastic tools, like a brush or ice scraper, to scrub it away. Give your deck a final rinse. Then be sure to dry it completely so that rust doesn't form.

Why does my mower leave a strip of grass between the blades?

Mower Blade Height: Get that blade height just right. If it's too high or too low, you'll end up with those pesky strips.

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