Before Work: Preparing Your Lawn Mower for Winter Storage

Essential safety steps and preparation tips to protect your mower during the winter months.


Important Safety Precautions

Always disconnect your mower before performing maintenance or storage preparation:

  • For petrol lawn mowers: disconnect the spark plug.
  • For electric lawn mowers: unplug the power cord.
  • For cordless lawn mowers: remove the battery.

These precautions prevent accidental starting and ensure your safety during cleaning or inspection.

How to Get a Petrol Mower Ready for Winter Storage

Before storing your lawn mower, perform a thorough clean after the final cut of the season. Use a brush or wooden scraper to remove any grass residue from the mower housing, cooling fins, and exhaust area.

Clean using water or a STIHL cleaning agent, and avoid directing strong water jets toward bearings, seals, or engine parts. When cleaning the underside, tip the mower so that the spark plug points upwards — tipping it sideways risks oil leakage into the air filter or exhaust, which can cause serious damage.

Cleaning the underside of a lawn mower with a brush and gloves
Preparing Your Petrol Lawn Mower’s Engine for Winter Storage

Empty the Petrol Tank

Always empty the petrol tank before storage. Fuel left inside will degrade over the winter and cause starting issues in spring. If only a small amount of petrol remains, simply run the mower until the engine stops by itself.

Person draining petrol from a STIHL RM 448 TC lawn mower

Check the Oil Level

Before storage, make sure the oil level is correct. If it’s due for a change, do it before winter rather than waiting until next season. Always follow the manufacturer’s instructions and use the recommended oil.

Checking the oil level of a lawn mower using a dipstick
Preparing a Cordless Lawn Mower and Battery for Winter Storage

The process for cordless lawn mowers is similar to petrol and electric types. Clean the mower thoroughly and grease moving parts before storing it.

Remove the battery first. Charge it to around 40–60% (2 LEDs), and store it in a dry room at 10–15°C. These conditions preserve battery health and ensure full performance in spring.

If your mower’s battery is fixed and cannot be removed, store the entire machine in a warm, dry space.

Removing the battery from a STIHL RMA 339C cordless lawn mower for winter storage
Summary: Storing Your Lawn Mower for Winter
  • Thoroughly clean your mower after the final cut.
  • Inspect and sharpen or replace the cutting blade.
  • Empty the fuel tank completely.
  • Check and top up oil as required.
  • Store your mower in a clean, dry place.
  • For cordless mowers: remove and store batteries in a warm, dry environment (10–15°C).