Can Lawn Mowers Get Wet?

Most lawnmowers are designed to withstand moisture to some degree, but excessive exposure to water can potentially damage the mower’s electrical parts, and fuel filter, and affect its performance. The question remains, can a lawnmower get wet?

Yes, lawnmowers can get wet to some extent. They are typically designed with protective measures to handle light rain or dew. However, experts advise against lawnmowers being exposed to heavy rain or completely submerged for a long period.

Can A Lawn Mower Be Left In The Rain?

No, leaving a lawn mower exposed to heavy rain for extended periods poses a risk of damage to several critical components. Rainwater, with its inherent moisture, has the potential to infiltrate sensitive areas of the mower, causing various issues that can compromise its performance and longevity.

Engine Components: The engine is a vital part of the lawn mower, and prolonged exposure to rain can lead to water seeping into critical engine components. Water inside the engine can disrupt combustion processes, corrode metal parts, and degrade overall performance.

Electrical System: Lawnmowers often have electrical components, such as ignition systems and wiring. Water infiltration in these areas can lead to electrical malfunctions, short circuits, and corrosion. Electrical issues can prevent the mower from starting or cause it to stall during operation.

Fuel System: The fuel system, including the fuel tank and carburetor, is susceptible to water contamination if the mower is left in the rain. Water entering the fuel system can disrupt the combustion process, affecting the engine’s ability to run smoothly.

Rust and Corrosion: Many parts of a lawn mower, including the blade, deck, and various metal components, are susceptible to rust and corrosion. Rainwater accelerates this process, particularly if the mower is not promptly dried and protected after exposure.

Air Filter: The air filter is crucial for maintaining proper air intake into the engine. If the air filter gets wet due to rain, it can impede airflow, affecting combustion efficiency. Additionally, a wet air filter can lead to the introduction of moisture into the engine, causing further complications.

To mitigate these potential issues, it is highly advisable to store the lawn mower in a dry place when not in use. If storing indoors is not feasible, using a waterproof cover designed for lawnmowers is an effective alternative.

This cover provides an additional layer of protection against rain, preventing water from directly contacting sensitive components.

Inspecting the mower, especially after exposure to wet conditions, can help identify and address potential problems early on. Taking proactive measures to keep the mower dry and protected contributes significantly to its overall reliability and extends its operational life.

What If Your Lawn Mower Doesn’t Start After Getting Wet?

Allow it to dry.

Explanation: Moisture, especially if the mower has been exposed to rain or wet conditions, can interfere with the engine’s ignition system. To address this, start by disconnecting the spark plug, which is a safety measure to prevent accidental starts.

After disconnecting the spark plug, allow the mower to dry thoroughly before attempting to start it again.

Why it’s important: Wet components, particularly in the engine and ignition system, can hinder the electrical connections needed for proper functioning. 

Allowing the mower to dry reduces the risk of short circuits and improves the chances of successful ignition.

Check for water ingress.

Explanation: Inspect key components for signs of water entry. Focus on areas prone to moisture, such as the air filter, carburetor, and other engine parts. If you identify any water, it’s crucial to dry these components thoroughly before attempting to start the mower.

Why it’s important: Water entering the engine or fuel system can disrupt the combustion process, leading to starting issues. By checking for water ingress, you address the root cause of the problem and take steps to eliminate the moisture.

Inspect the spark plug.

Explanation: The spark plug plays a vital role in igniting the fuel-air mixture in the engine. If it’s wet or in poor condition, it may impede the ignition process. Inspect the spark plug for any signs of moisture, and if necessary, dry it thoroughly before reinserting it into the engine.

Why it’s important: A wet spark plug is a common reason for difficulty in starting a lawn mower. Ensuring the spark plug is dry and in good condition maximizes the chances of a successful ignition, allowing the mower to start and run smoothly.

By systematically addressing these areas, you are targeting the most common areas where moisture may have affected the mower’s ability to start. Keep in mind that patience is key, as allowing sufficient time for components to dry is essential.

If the issue persists after these steps, further inspection by a professional may be necessary to identify and resolve any underlying problems.

Which Part of the Lawn Mower Can Get Wet?


The engine is a critical component of a lawn mower and is generally designed to handle some level of moisture. However, prolonged exposure to water, especially heavy rain or submersion, can lead to issues such as rust and corrosion in the engine components.


The carburetor itself is designed to be sealed, making it less prone to water exposure. The carburetor itself is generally sealed, reducing its susceptibility to water exposure. Moreover, its components are not directly exposed to the elements. 

However, if there are issues like water entering the fuel tank, it can impact the fuel mixture and combustion processes.

Electrical Components

While certain electrical components are designed to handle some moisture, prolonged exposure to water can indeed lead to malfunctions, short circuits, and corrosion.

The extent of vulnerability varies among different lawn mower models, but in general, protecting these components from excessive moisture is essential.

Air Filter

The air filter is designed to handle some moisture but can get wet in heavy rain or damp conditions. While it may not be as sensitive as other components, a wet air filter can still hinder proper airflow, potentially leading to starting difficulties and reduced engine performance.

What Do You Do If Your Lawn Mower Got Wet?

If your lawn mower gets wet, take the following steps:

  1. Disconnect the spark plug: Ensure the spark plug is disconnected to prevent accidental starts.
  2. Dry the mower: Wipe off any visible water and allow the mower to air dry completely.
  3. Inspect for damage: Check for water in critical components. Dry them thoroughly and lubricate them if necessary.
  4. Try to start the mower: After ensuring it is dry, attempt to start the mower. If it doesn’t start, follow the troubleshooting steps mentioned earlier.

Remember, prevention is key. Store your lawn mower in a sheltered area or cover it with a waterproof tarp when not in use to avoid unnecessary exposure to moisture.


Exposure to moisture poses a potential risk to lawnmowers, with heavy rain or submersion having adverse effects on crucial components such as the engine, electrical system, and fuel system.

While lawnmowers can handle some moisture, extended exposure may lead to rust, corrosion, and performance issues. Protecting these vulnerable parts from excessive moisture is crucial for maintaining a lawnmower’s reliability and operational life.

In case a lawnmower does get wet, immediate action is advised. Disconnecting the spark plug, thorough drying, and inspecting for damage are essential steps to prevent moisture-related problems.

Following these measures, along with proactive steps like storing the lawnmower in a dry place or using a waterproof cover, ensures optimal performance and extends the mower’s overall lifespan

Manny Moore

Getting my hands dirty and building a place that me and my small family love is a driving factor for what I do and how I do it. I want to share what I have learned and practiced so that it is just that much easier for everyone to have another tool in their tool belt. Your home should be a place that you love and feel comfortable in and your backyard should be no different.

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