Learning how to clean lawn mower equipment is a key part of seasonal maintenance. Giving your lawn mower a thorough clean after each season prevents grass buildup and corrosion. It also helps your mower run better and last much longer. This guide will walk you through the entire process safely and effectively.
How To Clean Lawn Mower
A complete clean involves more than just hosing of the deck. You need to address the undercarriage, engine area, and cutting blade. Doing this right protects your investment and ensures a clean cut next season. We’ll break it down into simple, manageable steps.
Safety Precautions Before You Start
Your safety is the most important step. Never skip these precautions before cleaning your mower.
- Disconnect the spark plug wire. This is non-negotiable to prevent accidental starting.
- Allow the engine to cool completely if you have just used the mower.
- Work in a well-ventilated area, especially if you are using any cleaning products.
- Wear safety glasses and sturdy gloves to protect your eyes and hands from debris.
- Have all your tools and supplies ready before you begin the job.
Tools And Supplies You Will Need
Gathering these items first makes the job go smoothly. You likely have most of them already.
- A putty knife or plastic scraper
- A stiff bristle brush or old toothbrush
- A garden hose with a spray nozzle
- A bucket of warm, soapy water (use dish soap)
- Degreaser or all-purpose cleaner
- Rags or shop towels
- A fuel stabilizer (if storing)
- Socket wrench set (for blade removal)
- Protective spray like WD-40
Step-by-Step Cleaning Process
Follow these steps in order for the best and safest results. Take your time with each section.
Step 1: Remove Debris and Loose Grass
Start by removing the bulk of the debris. Use your hands or a brush to clear grass clippings from the top of the mower deck, around the engine, and from the discharge chute. This makes the detailed cleaning easier later on.
Step 2: Clean the Mower Deck Underside
This is where the most grass and mud builds up. Carefully tip the mower on its side. Always tip it so the air filter and carburetor are facing up to prevent oil or fuel leaks into these sensitive parts. Use your putty knife to scrape off the caked-on grass. Be thorough but gentle to avoid damaging the deck’s paint.
Step 3: Scrub and Rinse the Deck
After scraping, apply your degreaser or soapy water to the underside. Let it sit for a few minutes to loosen stubborn grime. Scrub with your stiff brush. Then, use your garden hose to rinse everything away. Avoid directing a high-pressure stream directly at the engine or its seals.
Step 4: Address the Engine and Topside
Wipe down the entire top of the mower with a damp rag. For the engine cowling, use a rag with a little degreaser to remove dust and oil spots. Be careful not to get water or cleaner into the air intake or around the spark plug. Keeping this area clean prevents overheating.
Step 5: Clean or Replace the Air Filter
A clean air filter is crucial for engine performance. Remove the filter cover and take out the filter. If it’s a paper filter, tap it gently to remove dust. If it’s very dirty, replace it. If it’s a foam filter, you can wash it in warm soapy water, rinse, let it dry completely, and then apply a few drops of fresh engine oil before reinstalling.
Step 6: Remove and Sharpen the Blade
This step improves cutting performance and safety. With the spark plug still disconnected, use a block of wood to wedge the blade so it doesn’t turn. Use your socket wrench to loosen the bolt holding the blade. Once removed, clean all grass off the blade with a wire brush. Inspect it for cracks or excessive wear. You can sharpen it with a file or take it to a professional. Always balance the blade before reinstalling it.
Drying And Final Touches
Proper drying prevents rust and ensures easy starting.
- Use dry rags to wipe down the entire mower, especially the metal deck.
- Let the mower sit in the sun for an hour to air dry completely.
- Once dry, you can spray a light coat of a silicone protectant or WD-40 on the underside of the deck. This creates a barrier that makes grass less likely to stick next time.
- Check the tire pressure and inflate if necessary.
Preparing For Storage
If you are cleaning at the end of the season, proper storage prep is key. This prevents problems when you try to start it months later.
- Add a fuel stabilizer to the gas tank and run the engine for a few minutes. This circulates the treated fuel through the carburetor and prevents gumming.
- Alternatively, you can drain the fuel tank and carburetor completely.
- Store your mower in a cool, dry place, preferably covered with a breathable cloth.
Common Cleaning Mistakes To Avoid
Knowing what not to do is just as important. Avoid these common errors.
- Do not use a pressure washer. The high pressure can force water into bearings, the engine, and electrical connections, causing damage.
- Never clean a hot engine. This can warp components or cause burns.
- Avoid getting the air filter, spark plug, or carburetor wet during cleaning.
- Do not forget to reconnect the spark plug wire when you are finished.
- Never leave the deck wet, as this will lead to rust and corrosion over time.
FAQ Section
How often should I clean my lawn mower?
You should do a basic clean of the deck after every few uses to prevent heavy buildup. A deep clean, including the blade and air filter, should be performed at least once per season, ideally before storing it for winter.
Can I use water to clean my lawn mower engine?
You should avoid spraying water directly on the engine. Instead, use a damp rag or a brush to wipe away dirt and debris. Getting water into the engine’s electrical components or air intake can cause starting problems or serious damage.
What is the best cleaner for a lawn mower deck?
A simple mixture of dish soap and warm water works very well for most grass and mud. For tougher grease or oil, a commercial degreaser or all-purpose cleaner is effective. Always rinse thoroughly after using any cleaner.
Is it necessary to remove the blade to clean a mower?
For a basic clean, you may not need to remove it. However, for a thorough seasonal cleaning, removing the blade allows you to clean the deck spindle area completely and properly inspect and sharpen the blade, which is important for mower health.
How do I clean the carburetor on my lawn mower?
Carburetor cleaning is a more advanced task. It often involves removing the carburetor, disassembling it, and using a specialized carburetor cleaner spray to clear out jets and passages. If you are not comfortable with this, it’s best left to a small engine repair shop.