Storing Lawn Mower Outside – Protect Your Equipment From Rust
Finding enough space in a garage or shed is a common struggle for many homeowners and homesteaders. You likely want to keep your equipment in top shape, but your indoor storage areas are already overflowing with gear.
While keeping machinery indoors is ideal, storing lawn mower outside is a viable solution if you follow the right preservation steps. You can prevent rust, engine failure, and pest infestations by creating a dedicated outdoor setup.
In this guide, I will show you how to choose the right location, select the best protective materials, and prepare your mower for the elements. You will learn the professional secrets to keeping your machine ready for the next mow, regardless of the weather.
Table of Contents
Why Storing Lawn Mower Outside Requires a Strategic Plan
Leaving a mower exposed to the sky is a recipe for a seized engine and a rotted deck. Rain, snow, and morning dew create a high-moisture environment that accelerates metal oxidation.
Modern mowers contain sensitive components like carburetors, spark plugs, and electronic ignition systems. When you are storing lawn mower outside, these parts are vulnerable to corrosion and electrical shorts.
Temperature fluctuations also play a major role in equipment health. Rapid heating and cooling can cause condensation to form inside the fuel tank, leading to water-contaminated gasoline.
Sunlight is another silent enemy of outdoor equipment. UV rays degrade plastic fuel lines, fade paint, and make rubber tires brittle over time.
Without a solid plan, you risk turning your expensive mower into a pile of scrap metal within a single season. A little preparation now saves you hundreds of dollars in repair bills later.
Choosing the Best Location for Outdoor Storage
Location is the most critical factor when you decide on storing lawn mower outside. You must avoid low-lying areas where water pools after a heavy rainstorm.
Look for a spot that offers natural wind protection, such as the leeward side of your house or a sturdy fence. High winds can tear covers off or blow debris into the machine’s internal components.
Avoid placing the mower directly under the drip line of your roof. The concentrated flow of water from a gutter-less roof can penetrate even the best waterproof covers.
Elevating Your Mower Off the Ground
Never park your mower directly on grass or bare dirt for long periods. Soil holds moisture, which will constantly evaporate upward into the mower’s undercarriage.
Place your mower on a solid, elevated base like concrete pavers, a gravel pad, or a wooden pallet. This allows air to circulate underneath the deck, keeping the metal dry.
If you use a wooden pallet, ensure it is level to prevent oil from leaking into the cylinder head. A stable base also makes it much easier to secure the mower with locks or anchors.
Utilizing Natural and Structural Shade
Position your mower on the north or east side of a building to minimize direct afternoon sun exposure. Excessive heat can degrade the fuel and damage synthetic components like belts and pull cords.
Ensure the area has adequate ventilation. A spot tucked too tightly into a corner might trap humid air, creating a “sauna effect” under your mower cover.
Essential Gear for Weatherproofing Your Mower
A simple plastic tarp is rarely enough to protect your investment. Tarps are often non-breathable, which traps moisture against the metal and encourages mold and rust.
Invest in a high-quality, heavy-duty mower cover made from marine-grade polyester or similar UV-resistant fabrics. Look for covers with built-in air vents to allow moisture to escape.
Elastic hems and buckled straps are essential features. These ensure the cover stays tight during a storm and prevents the wind from turning it into a sail.
Portable Storage Tents and Shelters
If you have the space, consider a small “mower garage” or a portable storage tent. These structures provide a physical barrier between the mower and the falling rain.
These mini-shelters offer more protection than a simple cover because they create a pocket of dry air. They also make it easier to perform quick maintenance without uncovering the machine.
Ensure the shelter is anchored to the ground. Lightweight storage tents can easily flip over in high winds, potentially damaging the mower inside.
Using Deck Boxes for Small Mowers
For those with small push mowers, a large resin deck box can be an excellent storage solution. These boxes are waterproof, pest-proof, and blend into your outdoor decor.
Measure your mower carefully before buying a deck box. You may need to fold the handle down to make it fit comfortably inside the container.
Step-by-Step Preparation for Storing Lawn Mower Outside
Before you park the mower for the season, you must perform a deep clean. Dried grass clippings under the deck act like a sponge, holding water against the metal and causing rust holes.
- Clean the Undercarriage: Use a plastic scraper to remove all grass buildup from the blade area.
- Dry the Machine: Wipe down the entire mower with a dry cloth or use a leaf blower to remove every drop of water.
- Check the Oil: Change the oil if it is dirty, as old oil contains acidic contaminants that can corrode engine internals.
- Remove the Battery: If you have an electric-start mower, bring the battery indoors to a cool, dry place.
Applying a thin layer of silicone spray or WD-40 to the metal parts of the mower provides an extra barrier against moisture. Focus on the mower deck and any exposed cables.
Fuel Management for Long-Term Storage
Gasoline starts to degrade in as little as 30 days. When storing lawn mower outside, temperature swings accelerate this process, leading to “gumming” in the carburetor.
Add a high-quality fuel stabilizer to a full tank of fresh gas. Run the engine for five minutes to ensure the treated fuel reaches the carburetor jets.
A full tank is better than an empty one for outdoor storage. A full tank leaves no room for air, which prevents condensation from forming on the inner walls of the tank.
Lubricating Moving Parts
Apply a fresh coat of grease to any grease zerks on the mower. Lubricate the wheel axles and the pivot points for the height adjustment levers.
Coat the blades with a light layer of oil to prevent surface rust. This ensures they stay sharp and ready for the first cut of the spring season.
Protecting Your Mower from Pests and Wildlife
An outdoor mower is an attractive home for mice, rats, and stinging insects. Rodents love to chew on wiring harnesses and build nests in the cooling fins of the engine.
Place peppermint oil-soaked cotton balls or commercial rodent repellents near the engine intake. These scents are overwhelming to small animals and discourage them from moving in.
Seal off the exhaust pipe and the air intake with a piece of heavy-duty tape or a rag. Just remember to remove these “plugs” before you try to start the mower again.
Check the mower periodically for wasp nests. Insects often build nests under the deck or inside the handle tubes, which can lead to painful surprises during your first spring mow.
Security Measures to Prevent Theft
A lawn mower sitting outside is a tempting target for thieves. You must make it as difficult as possible for someone to wheel your machine away.
Use a heavy-duty hardened steel chain and a high-quality padlock to secure the mower to a permanent fixture. A ground anchor set in concrete is the gold standard for security.
Thread the chain through the mower frame, not just the wheels. Most mower wheels are plastic and can be easily broken or removed by a determined thief.
If possible, store the mower in a well-lit area or within the view of a security camera. Motion-activated lights are a great deterrent for anyone prowling around your property at night.
Winter vs. Summer: Seasonal Storage Adjustments
The challenges of outdoor storage change with the seasons. In the summer, your primary concerns are heat, UV damage, and humidity.
During the winter, you must deal with freezing temperatures and heavy snow loads. Snow sitting on top of a mower cover can eventually melt and seep through the fabric.
In cold climates, always remove the spark plug wire before storage. This is a vital safety step that prevents accidental starts if the mower is moved or tampered with.
If you live in an area with extreme winters, consider building a small wooden “lean-to” against your house. This provides a hard roof that can handle the weight of heavy snow.
Frequently Asked Questions About Storing Lawn Mower Outside
Can I leave my electric mower outside?
Electric mowers are much more sensitive to moisture than gas models. While you can store the body outside under a high-quality cover, you must bring the battery and the charger indoors to avoid permanent damage.
Is a tarp better than no cover at all?
A tarp is better than direct rain, but it is a poor long-term solution. Tarps trap moisture and can actually cause more rust than if the mower were left uncovered in a breezy area. Always choose a breathable cover if possible.
How often should I check on my mower?
You should inspect your mower at least once a month. Look for signs of pests, check that the cover is still secure, and ensure no water is pooling on the base or under the deck.
Will the tires go flat if stored outside?
Temperature changes can cause tire pressure to drop. Storing the mower on a hard surface rather than soil helps prevent the rubber from rotting, but you should still check the pressure before your first use.
Summary of Outdoor Mower Care
Successfully storing lawn mower outside is all about managing moisture and protecting the machine from the sun. By elevating the mower and using a breathable, high-quality cover, you eliminate the biggest risks.
Remember to treat your fuel, clean the deck thoroughly, and secure the machine against theft. These small steps ensure that your mower remains a reliable tool for years to come, even without a garage.
Take the time today to set up a proper outdoor storage station. Your mower—and your wallet—will thank you when the grass starts growing next spring. Stay safe and stay comfortable!
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