How To Store A Lawn Mower Outside Safely: Year-Round Guide & Best Methods

Can you store a lawn mower outside? Yes, you can store a lawn mower outside, but it requires careful preparation and protection to prevent damage from the elements and ensure its longevity. This guide will walk you through the best methods for year-round outdoor mower storage.

Storing your lawn mower outside might seem like the easiest option, but it’s crucial to do it correctly. Leaving your mower exposed to rain, sun, dust, and extreme temperatures can lead to rust, degraded parts, and a mower that’s difficult to start when you need it most. Proper outdoor mower storage is key to protecting your investment and ensuring reliable performance season after season. Whether you’re looking at winter mower storage or simply need a solution for summer mower storage, this comprehensive guide will help you keep your lawn equipment in top condition.

Preparing Your Mower for Outdoor Storage

Before you even think about covering or sheltering your mower, it needs to be prepped. This involves cleaning and preparing it for a period of inactivity. This initial step is vital for preventing corrosion and other damage.

Cleaning Your Lawn Mower

A clean mower is a happy mower. Dirt, grass clippings, and debris can hold moisture, accelerating rust and corrosion.

Remove Loose Debris: Start by using a brush or compressed air to remove all loose grass, leaves, and dirt from the mower deck, engine, and wheels.
Wash the Mower: Use a hose and a mild detergent to wash the mower. Avoid high-pressure washers, as they can force water into sensitive areas like the engine and electrical components.
Dry Thoroughly: This is a critical step. Use a clean cloth or towels to dry the mower completely. Pay special attention to metal parts and crevices where water can linger.

Fuel System Preparation

The fuel system is one of the most vulnerable parts of a mower during storage. Leaving fuel in the tank can lead to several problems.

Stabilize the Fuel: The best method is to add a fuel stabilizer to a nearly full tank of fresh gasoline. Run the engine for about 5-10 minutes. This allows the stabilized fuel to circulate throughout the fuel system, including the carburetor. This prevents the fuel from breaking down and gumming up the carburetor jets.
Empty the Fuel Tank (Alternative): If you prefer not to use a stabilizer, you can drain the fuel tank completely. This is a more labor-intensive method but ensures no old fuel remains. Dispose of the drained fuel responsibly.

Oil and Other Fluids

Change the Oil: If you’re storing the mower for an extended period, especially over winter, it’s a good idea to change the oil. Old oil can contain contaminants and acids that can damage the engine over time. Warm oil drains more easily.
Check Other Fluids (for Riding Mowers): For riding mowers, check and top off any other essential fluids like transmission fluid and brake fluid if necessary.

Battery Care (Electric Start Mowers)

If your mower has an electric start, the battery needs attention.

Disconnect the Battery: Disconnect the battery terminals to prevent a slow drain.
Store Separately (Recommended): For long-term storage, it’s best to remove the battery and store it in a cool, dry place, away from extreme temperatures. A trickle charger or battery tender can help maintain its charge.

Spark Plug Maintenance

Remove and Inspect: Remove the spark plug. Inspect it for wear or fouling.
Add Oil: Pour a small amount of clean engine oil (about a tablespoon) into the spark plug hole. This lubricates the cylinder walls and piston rings, preventing rust during storage.
Replace Spark Plug: Reinstall the spark plug, but do not reconnect the spark plug wire. This prevents accidental starting.

Essential Protection Methods for Outdoor Mower Storage

Once your mower is prepped, the focus shifts to protecting it from the elements. This is where mower protection and weatherproofing a mower become paramount.

Using a Mower Cover

A good quality mower cover is your first line of defense against outdoor storage challenges.

Material Matters: Look for covers made from durable, waterproof, and UV-resistant materials like heavy-duty polyester or vinyl. These materials offer good protection against rain, sun fading, and dust.
Proper Fit: Ensure the cover is the right size for your mower. A cover that’s too loose won’t offer adequate protection and can flap in the wind, potentially causing damage. A snug fit will keep out moisture and debris more effectively.
Breathability: Some covers have vents to allow airflow, which can help prevent condensation buildup inside the cover. Condensation can lead to mold and mildew.
Securing the Cover: Most mower covers have elastic hems, straps, or drawstrings to secure them tightly to the mower, preventing them from blowing off in strong winds.

Table: Mower Cover Features to Consider

Feature	Importance	Benefit
Waterproof	Prevents rain and snow from reaching the mower	Reduces rust and corrosion
UV Resistance	Protects against sun damage and fading	Maintains mower appearance and prevents plastic degradation
Breathability	Allows air circulation to reduce condensation	Prevents mold, mildew, and internal moisture damage
Durable Material	Withstands tears, punctures, and general wear and tear	Long-lasting protection
Secure Fit	Prevents the cover from blowing off in wind	Ensures consistent protection
Full Coverage	Protects the entire mower, including wheels and engine	Comprehensive defense against the elements

The Role of a Mower Tarp

A mower tarp can serve as an additional layer of protection, especially when combined with a mower cover or as a standalone solution in a pinch.

Heavy-Duty Tarps: Opt for heavy-duty tarps made from materials like polyethylene or canvas. These are generally waterproof and tear-resistant.
Securing the Tarp: Use bungee cords, ropes, or tie-downs to secure the tarp tightly around the mower. Ensure there are no gaps where rain or wind can penetrate.
Elevation: If you’re storing the mower directly on the ground with a tarp, try to elevate it slightly off the ground. Placing it on wooden blocks or pallets can prevent moisture from seeping up from the soil.

Shelter Options for Mower Storage

While a cover or tarp offers good protection, a dedicated shelter provides the highest level of security for your lawn equipment storage.

Storing a Lawn Mower Under an Eave or Porch

This is a simple and effective solution for many homeowners.

Protection from Direct Rain/Snow: Storing the mower under an eave or a covered porch shields it from direct precipitation.
Limited Sun Exposure: It also offers some protection from direct sunlight, which can fade paint and degrade plastic parts.
Consider Ventilation: Ensure the area has adequate airflow to prevent moisture buildup.
Still Use a Cover: Even in a sheltered location, using a mower cover is highly recommended to protect against dust, insects, and any incidental moisture.

The Advantages of a Mower Shed or Storage Unit

A dedicated mower shed or storage unit offers the most comprehensive protection.

Full Environmental Control: Sheds provide complete protection from rain, snow, sun, wind, and dust.
Security: They also offer a degree of security against theft.
Organization: A shed can also be used to store other lawn equipment, keeping everything organized and protected in one place.
Types of Sheds:
- Prefabricated Sheds: These are readily available and can be assembled on-site. They come in various sizes and materials (plastic, metal, wood).
- DIY Sheds: For those with woodworking skills, building a custom shed can be a cost-effective and tailored solution.
- Lean-to Sheds: These attach to an existing structure (like a garage or house) and can save space.
Placement: Position the shed on a level, well-drained surface. A gravel base or concrete pad can further improve drainage and stability.

Storing Riding Mower Outdoors

Storing a riding mower outdoors requires even more attention due to its larger size and more complex components.

Larger Shelter Needed: A riding mower typically requires a larger shelter, such as a small garage, a dedicated riding mower shed, or at least a very large, well-secured tarp.
Covering Wheels and Engine: Ensure the cover or tarp provides full coverage, especially for the engine and tires, which are more exposed on a riding mower.
Tire Care: Over time, tires can deflate or develop flat spots if left in one position for too long. Consider overinflating the tires slightly or placing the mower on blocks to take the weight off the tires.

Seasonal Considerations for Outdoor Mower Storage

The best methods for outdoor mower storage can vary slightly depending on the season.

Winter Mower Storage

Winter presents the most significant challenges for outdoor storage. Cold temperatures, snow, and ice can cause considerable damage.

Thorough Cleaning: Ensure the mower is spotless, as any remaining moisture can freeze and expand, damaging components.
Fuel System Protection: Stabilizing or draining the fuel is absolutely critical for winter mower storage.
Battery Removal: Remove and store the battery indoors in a temperature-stable environment.
Protect Against Rodents: Rodents can chew through wires and build nests in engines. Consider using rodent repellents (like peppermint oil-soaked rags placed nearby, not directly on the mower) or mothballs in the storage area.
Cover and Shelter: Use a high-quality, waterproof, and breathable mower cover. If possible, store it in a mower shed or under a more robust shelter to protect it from snow accumulation and ice.
Check Tire Pressure: Ensure tires are properly inflated before storage to prevent flat spots.

Summer Mower Storage

While summer might seem less harsh, prolonged exposure to intense sun and heat can also cause damage.

Sun Protection: The primary concern in summer is UV damage. A good mower cover with UV resistance is essential. Storing under a shaded area or in a shed offers additional protection.
Dust and Debris: Summer can be dusty. Regular cleaning and a good cover will keep dust from accumulating and potentially clogging air filters or coating moving parts.
Moisture (Rain Showers): Even in summer, occasional rain showers can occur. Ensure your cover is waterproof and securely fastened.

Advanced Mower Protection and Maintenance Tips

Beyond the basic steps, a few advanced techniques can further enhance your mower’s lifespan when stored outdoors.

Lubrication Points

Grease Points: For mowers with grease fittings (common on riding mowers), lubricate them before storage according to the manufacturer’s recommendations.
Cables and Linkages: Apply a light coat of lubricant to control cables, linkages, and pivot points. This prevents them from seizing up.

Protecting Against Rust

Rust Inhibitors: For metal parts that might be exposed, consider applying a light coat of rust inhibitor spray or a silicone-based lubricant.
Corrosion Protection for Electrical Connections: Apply dielectric grease to electrical connections to prevent corrosion.

Wheel and Tire Management

Inflate Tires: Ensure tires are properly inflated, even for short-term outdoor storage.
Prevent Flat Spots: For long-term storage, especially over winter, placing the mower on blocks can prevent tires from developing flat spots. This is particularly important for riding mower tires.

Choosing the Right Location for Outdoor Storage

The specific spot you choose for your mower storage can significantly impact its condition.

Ideal Outdoor Storage Locations

Under a Covered Patio or Deck: Offers good protection from rain and sun.
Inside a Shed or Garage: The best option for maximum protection.
Against the Side of a House or Garage: Position the mower with the engine or control panel facing away from prevailing winds and rain.

Locations to Avoid

Directly on Bare Ground: This promotes moisture absorption and can lead to rust.
Under Trees: Falling branches, sap, leaves, and bird droppings can damage the mower and its cover.
In Low-Lying Areas: These areas can accumulate water during heavy rain or snowmelt.
Exposed to Strong Winds: This can damage the mower or blow off covers.

Frequently Asked Questions (FAQ)

Q1: Can I store my electric lawn mower outside?
A1: Yes, you can store an electric lawn mower outside, but you must take precautions, especially regarding the battery. Ensure the battery is fully charged, disconnected, and preferably stored indoors in a cool, dry place. Protect the mower itself with a waterproof cover to keep the motor and electrical components dry.

Q2: What happens if I don’t stabilize the fuel before storing my mower?
A2: If you don’t stabilize or drain the fuel, it can degrade over time. This stale fuel can clog the carburetor, leading to starting problems or rough running when you try to use the mower again.

Q3: How often should I check on my mower during outdoor storage?
A3: It’s a good practice to check on your mower periodically, perhaps once a month, especially during winter. This allows you to ensure the cover is secure, check for any signs of rodent activity, and make sure no water has accumulated.

Q4: Can I use a simple plastic sheet as a mower cover?
A4: While a plastic sheet can offer minimal protection from dust, it’s not recommended for long-term outdoor mower storage. Most plastic sheets are not waterproof or UV-resistant, and they can trap moisture, leading to condensation and rust. They also tear easily and offer little protection from wind. Invest in a proper mower cover designed for outdoor use.

Q5: Should I remove the spark plug for outdoor storage?
A5: Yes, for long-term storage, it’s advisable to remove the spark plug, add a small amount of engine oil into the cylinder, and then reinstall the spark plug without connecting the spark plug wire. This protects the cylinder walls from rust.

By following these comprehensive guidelines, you can ensure your lawn mower remains in excellent condition, ready to tackle your lawn maintenance tasks whenever needed, regardless of the season or where you choose to store it outdoors. Proper preparation and consistent protection are the keys to extending the life of your valuable lawn equipment.