How to Winterize Your Lawn Mower: A Complete Guide

As the leaves fall and temperatures drop, it's time to put your lawn mower away for the season. Proper winterization can extend the life of your mower by years and ensure it starts right up come spring.

Why Winterization Matters

Leaving fuel in your mower over winter is the #1 cause of spring starting problems. Old gasoline breaks down, leaving gummy deposits that clog your carburetor and fuel lines.

Step-by-Step Winterization

1. Run the Tank Dry

Start by running your mower until it runs out of gas. This prevents stale fuel from damaging the carburetor.

2. Change the Oil

Used oil contains contaminants that can corrode engine parts over months of storage. Drain the old oil and refill with fresh oil.

3. Replace the Spark Plug

A new spark plug costs just a few dollars and ensures reliable starting in spring.

4. Clean or Replace the Air Filter

Remove the air filter and clean it (foam filters) or replace it (paper filters).

5. Sharpen or Replace the Blade

A sharp blade makes cleaner cuts and reduces engine strain. Take your blade to a local small engine repair shop for professional sharpening.

6. Clean the Deck

Remove any caked-on grass from under the mower deck. Grass buildup promotes rust and reduces cutting efficiency.

7. Store Properly

Store your mower in a dry, covered location. A garage or shed is ideal.

When to Call a Professional

If your mower needs more than basic maintenance—like a carburetor rebuild, engine work, or transmission repair—take it to a qualified small engine repair shop. Use our directory to find a trusted shop near you.