Essential Lawn Mower Maintenance Checklist for Winter Storage

Lawn mower care might not be something you think about often - at least not until your mower stops working. If you want it to last and your lawn to stay healthy, regular maintenance is a must.

One of the most important parts of that care is winterizing your mower, which means getting it ready for storage during the colder months. Luckily, it’s easy to do. A few simple steps now can prevent damage, improve safety and make sure your mower is ready to roll once spring arrives.

Below, you’ll find a complete checklist for lawn mower maintenance, including why upkeep matters, how to care for your mower year-round and what to do before storing it for winter. 

Keeping your mower in top shape pays off for both your equipment and your lawn. Regular maintenance ensures your mower runs efficiently, your grass stays healthy and minor issues don’t turn into costly repairs. A few simple steps now can make all the difference when mowing season arrives. Here are some key benefits to consider.

Better Performance and Healthier Grass

When your mower blades are sharp, they slice through grass cleanly, leaving behind a crisp, even cut. Dull blades, however, tear at the grass instead of cutting it to the right height. That tearing can cause your lawn to look uneven or frayed and may even create entry points for pests and diseases. Over time, the repeated stress of dull-blade mowing can weaken your turf and make it more vulnerable to browning or thinning.

Improved Safety and Longevity

A mower that’s poorly maintained can be unpredictable and dangerous. For gas-powered models, old or degraded fuel can gum up the carburetor and cause overheating or engine failure. Electric mowers can also pose risks if cords or connections wear down over time, leading to potential sparks or shorts. Regular inspections help catch small issues early, whether that means replacing a frayed wire, tightening a loose bolt or cleaning out buildup before it affects performance.

Why it’s Worth the Effort

Taking care of your mower doesn’t just keep it running; it helps your lawn look its best. A well-maintained mower delivers consistent, even results that promote stronger, greener growth across your yard. By staying proactive with small maintenance tasks like these, you’ll extend your mower’s lifespan and reduce the chance of mid-season breakdowns. 

Even when it’s not mowing season, a few good habits can go a long way toward keeping your mower in top shape. Consistent care helps extend its lifespan, keeps your lawn looking great and ensures your equipment is ready to perform when you need it. Here are some top TruGreen tips for a healthy lawn mower:

1. Keep the blades sharp: Sharp blades are essential for a clean, even cut. Inspect your blades regularly and replace them if they’re dented, bent, chipped or cracked. Sharp blades reduce stress on your mower’s engine and help your grass recover more quickly after mowing.
2. Check tire pressure: If your mower has air-filled tires, keep an eye on the pressure before each use. Uneven or low-pressure tires can cause an uneven cut and make your mower harder to push or steer. Balanced tires also reduce wear on your mower’s transmission and improve fuel efficiency for gas models.
3. Change the oil regularly: Just like a car, your mower’s engine depends on clean oil to keep moving parts lubricated. Check your owner’s manual for the recommended oil type and change schedule - typically every 25 to 50 hours of operation. Fresh oil helps prevent overheating, protects against corrosion and ensures smoother starts.
4. Replace the spark plug annually: A fresh spark plug helps your engine start easily and run efficiently. Replace it after about 100 hours of use or once a year to avoid misfires, stalling or hard starts. It’s one of the simplest and most affordable ways to keep your mower performing well.
5. Clean or replace the air filter: Your mower’s air filter blocks dirt, dust and grass clippings from entering the engine. A dirty filter restricts airflow, forcing the engine to work harder. Check it every few weeks during the mowing season and clean or replace it when it looks clogged or discolored.

If DIY maintenance isn’t your thing, don’t sweat it. A local lawn mower repair shop can handle tune-ups, blade sharpening and oil changes for you. Professional service can be especially helpful before storage or at the start of each mowing season. 

If you live in an area with cold winters, winterizing your mower is important to protect it from damage. The process is a little different depending on whether your mower runs on gas or electricity.

Cleaning the Mower Deck

Grass clippings and dirt can build up under the deck, causing rust and uneven performance. To clean your mower before storage:

• Turn the mower off and disconnect the spark plug.
• Tip it on its side with the carburetor facing up for gas models.
• Scrape away debris with a brush or scraper, then rinse with warm water.
• Dry completely to prevent rust.

Removing or Stabilizing the Fuel

Fuel left in your mower over winter can go stale and damage the carburetor.

• Drain the tank using a siphon or by tipping it into a gas can.
• Add a fuel stabilizer to keep gas fresh and prevent moisture buildup.

Battery and Electrical Component Care

For electric mowers:

• Remove the battery before storing.
• Keep it indoors with about 40% charge.
• Check the manual to see if it requires a mid-season recharge.

Storing in a Safe and Dry Location

• Store your mower in a clean, dry area.
• Use a waterproof cover or tarp to protect it from dust and moisture.