How to clean a lawn mower

6 Minute(s) read

In Victoria’s changing seasons, from damp autumns to dry summer spells, regular mower cleaning is essential to prevent clogging and corrosion. Over time, grass clippings, dirt, and debris can build up in different parts of the mower, affecting efficiency and causing mechanical issues. A well-maintained mower ensures smooth operation, cleaner cuts, and reduced wear and tear on components.

This guide will cover how to clean a lawn mower, including best practices, tools required, and step-by-step instructions for cleaning the carburetor and spark plug. If you're more of a visual learner, we've also included a video showing you how to properly clean the lawn mower.

Best practices for cleaning a lawn mower

A little care goes a long way when it comes to keeping your lawn mower in top shape. Taking a few minutes after each mowing session to remove dirt and debris can save you time and money on repairs in the long run.  Follow these best practices to maintain a clean and efficient mower:

• Clean after every use – Removing grass clippings and dirt after mowing your lawn prevents buildup.
• Inspect before cleaning – Check for loose bolts, damaged parts, and fuel leaks.
• Use the right tools – A brush, compressed air, and mild detergent can help remove grime without damaging parts.
• Avoid using excessive water – Water exposure can cause rust and electrical damage.
• Sharpen blades regularly – Keeping mower blades sharp improves cutting efficiency and prevents grass from tearing.
• Store properly – In Victoria’s cooler months, store your mower in a dry, covered space to prevent corrosion and moisture damage.

How to clean a lawn mower: a step-by-step guide

Before you begin, give your lawn mower time to cool down after you have turned it off. This is integral to ensuring you remain safe throughout the deep cleaning process.  

Tools and materials needed

The right tools make all the difference when it comes to cleaning your mower efficiently. Gather these essentials before you start to make the process quick and hassle-free. Using improper tools may damage mower components, so it’s important to choose the right ones for the job.

Step 1: Disconnect power

Safety first! Before diving into the cleaning process, make sure your mower is completely powered off to prevent any unexpected surprises. This prevents accidental starts and reduces the risk of injury while handling the mower.

• For a petrol lawn mower, disconnect the spark plug to prevent accidental starting.
• For an electric lawn mower, unplug the battery or remove the power cord.

Step 2: Remove grass and debris

A clogged mower deck not only affects performance but also makes lawn maintenance a frustrating experience. Taking a few minutes to clear the buildup can keep your mower running like new. 

• Use a stiff brush or scraper to remove built-up grass under the deck.
• If your mower has a washout port, attach a garden hose and run the blade while flushing out debris.
• Wipe the exterior with a damp cloth and mild detergent.

Step 3: Clean the mower blades

Dull mower blades tear grass instead of cutting it cleanly, leaving your lawn looking ragged. Regularly cleaning them helps maintain their sharpness and improves cutting performance.

• Carefully remove the mower blades if they are heavily covered in dirt.
• Scrub them with a wire brush and rinse with a damp cloth.
• Reinstall the blades securely before using the mower again.

Step 4: Check and clean the air filter

Think of your mower’s air filter like its lungs—if it's clogged, your engine can't breathe properly. Regular cleaning keeps your mower running at full power with better fuel efficiency. 

• Remove the air filter cover and take out the filter.
• If it’s foam, wash it with soap and water and let it dry before reinstalling.
• If it’s paper, tap it gently to remove debris or replace it if excessively dirty.

How to clean a lawn mower carburetor without removing it

A dirty carburetor can cause starting issues, rough idling, and reduced power. Cleaning it without removing it can help restore performance.

Step-by-step process:

This method is effective for quick maintenance without needing to disassemble the mower.

1. Turn off the mower and disconnect the spark plug for safety.
2. Locate the carburetor – It is usually near the air filter and fuel line.
3. Spray carburetor cleaner – Use a specialised carburetor cleaner spray to loosen dirt and deposits.
4. Operate the throttle – Move the throttle back and forth to help distribute the cleaner inside.
5. Wipe away debris – Use a clean cloth to remove loosened grime.
6. Start the mower – Reconnect the spark plug and test if it runs smoothly.

Regular carburetor maintenance ensures consistent fuel flow and engine performance. This is especially helpful during Melbourne’s peak mowing periods in spring and summer, when reliable engine performance matters most.

How to clean a spark plug on a lawn mower

A dirty or fouled spark plug can prevent your mower from starting or running efficiently. Cleaning it regularly helps maintain proper ignition.

Steps to clean a spark plug:

Your spark plug is a tiny but mighty component that keeps your mower firing on all cylinders. Keeping it clean ensures easy starts and optimal performance. 

1. Disconnect the spark plug wire – Ensure no power is running to the mower.
2. Remove the spark plug – Use a spark plug wrench to unscrew it.
3. Inspect for buildup – Look for carbon deposits, oil, or rust on the electrode.
4. Clean the plug:
   • Use a wire brush or fine sandpaper to remove dirt and buildup.
   • Spray with a specialised spark plug cleaner if necessary.
5. Check the gap – Use a gap gauge to ensure proper spacing between electrodes.
6. Reinstall and reconnect – Securely screw in the spark plug and reattach the wire.

Regular spark plug maintenance improves ignition, fuel efficiency, and mower performance.

Get expert lawn care advice from Lilydale Instant Lawn

A well-maintained lawn mower is the secret to a perfect lawn. Regular cleaning and maintenance will keep it in peak condition, so you can enjoy effortless mowing every time. 

At Lilydale Instant Lawn, we offer premium turf solutions and expert guidance on maintaining a lush, green lawn in Melbourne. With various turf varieties on offer and a professional team by your side, we're ready to get your lawn looking its best.