Winterizing Your Lawn Mower: Essential Steps for Off-Season Storage

Credit: mjpyro

When the mowing season ends, don't just park your mower in the shed. Proper winterization ensures it starts reliably next spring and extends its lifespan. The process is similar for push and riding mowers, but always consult your owner's manual for model-specific details.

Drain the Oil

If you've logged more than 25 hours of use, an oil change is recommended. Run the engine for a few minutes to warm the oil—it drains faster when hot. Clean the area around the dipstick and oil fill port to prevent debris from entering the engine.

Remove the dipstick and tip the mower over a shallow pan to drain the oil. Most push mowers drain through the fill hole; some have a separate plug underneath. If your mower has an oil filter, replace it now by catching residual oil in a cup, twisting off the old filter, and installing a new one. Do not refill with fresh oil until spring; use 10W-30 when you do.

Remove and Clean Air and Fuel Filters

Access the air filter by removing its cover. Wash a reusable filter with water and let it dry completely in the sun. While the cover is off, locate the fuel filter behind the air filter housing. Disconnect the fuel line, replace the filter (note the flow direction arrows), and reassemble. Replace the air filter if it shows wear—new ones cost around $6 and are worth the investment.

Drain and Dispose of Old Gas

Never store gasoline in the mower over winter. Plan your last mow to use up the tank. If fuel remains, siphon it into a gas can for use in your vehicle, or drain it by tilting the mower and pumping the primer bulb to clear the lines. Alternatively, disconnect the fuel line at the carburetor and let it drain into a container. Dispose of old gas responsibly—never pour it on the ground.

Final Thoughts

Credit: mjpyro

Routine maintenance and proper storage can keep a mower running for a decade or more. In spring, add 10W-30 oil before starting, and consider sharpening the blade for a clean cut all season.

How to Sharpen a Lawn Mower Blade