Storing your lawn mower for the winter properly saves you time and money when spring arrives. This guide walks you through every step—from draining fuel to protecting the engine—so your mower starts easily next season. With the right preparation, you’ll avoid common pitfalls like carburetor clogs and blade rust.
Storing your lawn mower for the winter doesn’t have to be stressful. In fact, taking just a few extra minutes now can save you hours of frustration when you’re ready to mow again in the spring. Whether you own a push mower, riding mower, or electric model, proper winter storage protects your investment and keeps your equipment running smoothly.
This guide will walk you through every step of preparing your mower for cold weather. You’ll learn how to drain fuel safely, clean the undercarriage, protect metal parts from rust, and choose the best storage spot. By following these steps, you’ll ensure your mower starts easily and performs at its best when you need it most.
Let’s get started with a simple checklist and then dive into detailed instructions for each phase of winter prep.
Key Takeaways
- Drain or stabilize the fuel: Old gas can gum up the carburetor. Use a fuel stabilizer or drain the tank before storing.
- Clean the mower thoroughly: Remove grass clippings, dirt, and debris to prevent rust and corrosion during long-term storage.
- Lubricate moving parts: Apply oil to wheels, axles, and undercarriage to keep them from seizing up over winter.
- Store in a dry, sheltered place: Keep your mower indoors or under cover to protect it from snow, ice, and moisture.
- Remove the battery (for electric models): Prevent battery drain and extend its life by removing it and storing it separately.
- Sharpen the blades before storage: A sharp blade cuts cleaner in spring and reduces strain on the engine.
- Check the manual for model-specific tips: Some mowers have unique requirements—always follow manufacturer guidelines.
Step-by-Step Guide: How to Store a Lawn Mower for the Winter
1. Gather Your Supplies
Before you begin, make sure you have everything you need. Having tools and materials ready makes the process faster and safer.
- Safety gloves and goggles
- Fresh gasoline (if refueling)
- Fuel stabilizer (optional but recommended)
- Engine oil or light lubricant (like WD-40)
- Clean rags or shop towels
- Small brush or old toothbrush
- Container for old fuel (if draining)
- Battery terminal puller (for electric mowers)
- Blade sharpening tool or kit
Having these on hand prevents interruptions and ensures you don’t skip important steps because something is missing.
2. Clean the Mower Thoroughly
Grass buildup and dirt create the perfect environment for rust and mold. A clean mower stores better and lasts longer.
Start by turning off the engine and disconnecting the spark plug. This removes any risk of accidental ignition. Then, use a brush to scrub the deck, especially around the edges where clippings collect. Wipe down all surfaces with a damp cloth. Don’t forget to clean the air filter housing and around the recoil starter.
For stubborn residue, mix warm water with dish soap and spray it onto the underside. Let it sit for 10 minutes, then scrape gently with a plastic scraper—never metal, which could scratch the surface.
After cleaning, inspect the blade for nicks or bends. If it looks dull or damaged, consider sharpening it now. A sharp blade reduces engine strain and improves cut quality in spring. For detailed instructions, check out our guide on how to sharpen the blades on a lawn mower.
3. Sharpen the Blade Before Storage
You might wonder why sharpening matters so much before winter. The truth is, a dull blade forces the engine to work harder, using more fuel and creating uneven cuts. By sharpening it now, you set your mower up for peak performance in the next mowing season.
Remove the blade carefully using a wrench. Secure it on a flat surface and file the edge until smooth. Most blades need only light sanding with a rotary tool or bench grinder. Be careful not to remove too much metal—just enough to restore a sharp edge.
Once sharpened, reinstall the blade tightly. Loose blades can wobble and damage the engine. If you’re unsure about the process, our step-by-step guide covers how to sharpen blades on a push mower and riding mowers with clear visuals.
4. Drain or Stabilize the Fuel
Gasoline breaks down over time, forming varnish and sludge that clog carburetors. Even if you plan to use the mower soon, leftover fuel from last season is likely degraded.
The best practice is to either drain the tank completely or add a fuel stabilizer. If you choose to drain, run the engine until the tank is empty. Use a siphon pump or carefully tilt the mower to pour out remaining fuel into a sealed container. Never store mowers with fuel inside unless you’ve used a stabilizer.
Fuel stabilizers like Sta-Bil extend gasoline life by up to two years. Add it according to package directions—usually 1 ounce per gallon—and run the engine for 5–10 minutes to circulate treated fuel through the system. Afterward, you can leave the tank full if you prefer, but always label it clearly.
5. Change the Oil (If Needed)
Old engine oil loses its lubricating properties and can contain contaminants. While not required for every model, changing the oil before winter storage helps keep the engine healthy.
Run the mower for a few minutes to warm the oil—it flows easier when hot. Then shut it off, tilt the mower slightly to drain oil into a pan, and replace the oil filter if your model has one. Refill with fresh oil as specified in the owner’s manual.
Some manufacturers recommend changing oil after every 25 hours of use. If yours hasn’t been serviced recently, this is a great opportunity. Check our guide on changing oil in Honda mowers for specific procedures.
6. Lubricate Moving Parts
Metal parts exposed to moisture can seize up over winter. Applying a light coat of oil prevents rust and ensures smooth operation when you restart the mower.
Spray lubricant on the wheels, axle shafts, and undercarriage hinges. Don’t overdo it—too much oil attracts dust and grime. A thin film is enough. You can use general-purpose grease or a product like WD-40 Specialist Long Term Rust Protection.
Also, wipe down the recoil starter cord lightly with oil to prevent fraying. This small step makes pulling the start easier in spring.
7. Prepare the Battery (For Electric Models)
Electric mowers rely on batteries, which lose charge over time—especially in cold weather. Leaving a battery connected all winter can drain it completely.
Disconnect the negative terminal first to avoid sparks. Remove the battery and store it in a cool, dry place, ideally between 50°F and 80°F. Charge it once a month if possible. For lithium-ion batteries, full discharge isn’t necessary—just keep it above 20% charge.
If your mower uses a removable battery, refer to the manual for storage guidelines. Some brands recommend storing batteries indoors year-round. Learn more in our article on starting electric mowers after winter.
8. Choose the Right Storage Location
Where you store your mower matters almost as much as how you prepare it. Moisture, temperature swings, and pests can ruin even the cleanest mower.
The ideal spot is a dry garage, shed, or basement. Avoid attics with poor ventilation or outdoor sheds without insulation. If you must store it outside, cover it tightly with a breathable tarp—not plastic sheeting, which traps moisture and causes condensation.
Keep the mower elevated off the ground using blocks or a shelf. This prevents water from pooling underneath. Also, place it on level ground to avoid warping the frame.
9. Final Safety Checks
Before closing up shop for winter, do a quick final inspection.
- Confirm the spark plug is disconnected.
- Double-check that all nuts and bolts are tight.
- Ensure the blade is securely fastened.
- Verify the fuel cap is secure (if using stabilizer).
Take a photo of the mower from multiple angles. It’s helpful if you ever need to troubleshoot starting issues in spring or compare wear patterns later.
Troubleshooting Common Storage Issues
Even with careful prep, problems can arise when you try to start your mower in March. Here’s how to handle some common issues:
Problem: Engine Won’t Start After Winter
This usually means old fuel or dried-up oil. First, check the spark plug—replace it if wet or corroded. Next, inspect the fuel line and carburetor. If the tank was drained, stale air can cause vapor lock. Try pouring fresh gas directly into the carburetor bowl using a funnel. If that fails, clean or rebuild the carburetor. Our guide on cleaning a carburetor without removal walks you through safe disassembly and cleaning.
Problem: Blade Feels Loose or Wobbly
A loose blade can vibrate dangerously and damage the engine. Tighten the bolt with a wrench, but don’t overtighten. If the hole is stripped, use an oversized bolt or install a new blade carrier plate. Always replace worn bushings or bearings while you’re at it.
Problem: Rust Spots Appear on Deck
Rust forms when moisture lingers on metal surfaces. To prevent it, always dry the mower completely before storing. For existing spots, scrub with vinegar or a commercial rust remover, then apply touch-up paint if available. Regular maintenance like this extends deck life significantly.
Conclusion
Storing your lawn mower for the winter doesn’t have to be overwhelming. By following these steps—cleaning, fuel treatment, blade care, and proper placement—you protect your investment and simplify spring startup. Remember, prevention is always easier than repair.
Taking 30–60 minutes now pays off with reliable performance next season. Whether you have a push mower or a heavy-duty riding model, consistent care ensures years of trouble-free service. And when you’re ready to bring your mower back to life in spring, you’ll already know exactly what to expect.
For more help getting your mower running again, check out our comprehensive guide on how to start a lawn mower after winter. And if you’re shopping for a new model, explore our tips on choosing the right mower for your yard.
With the right preparation, your lawn mower will be ready when the grass starts growing. Happy storing!