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Lawnmower Maintenance Guide: How to Keep Your Mower Running Smoothly

  • Writer: Andrew Limbert
    Andrew Limbert
  • Aug 18
  • 6 min read

Taking care of your lawnmower is crucial for any gardening enthusiast looking to keep their garden in top shape. As the seasons change, so do the needs of your trusty mower, and knowing how to adapt your care routine can make all the difference. In this post, we'll share a seasonal lawnmower checklist filled with practical lawnmower care tips that will help you maintain your equipment efficiently. Whether it's learning about cleaning techniques, the importance of sharpening mower blades, or understanding common issues that might arise, we've got you covered. So grab a cuppa, get comfortable, and let's make sure your lawnmower is ready to tackle the grass all year round!


Person in gloves inspecting an orange lawn mower on grass. The mower is tilted, revealing the blades. Outdoor maintenance setting.

Now we're in the middle of summer, your grass has probably stopped growing due to lack of water. However as the weather starts to cool down and the rain returns, it's time to get your lawnmower ready for the busy few weeks when it starts to grow again and look untidy.


Inspect and Clean the Mower


Start your summer lawnmower care by giving your machine a thorough inspection and clean. Buy now, as your lawnmower has seen some action already this year; this step is crucial for identifying any issues that may have developed while it wasn't being used.


Before you start, make sure your lawnmower cannot start up by accident. If yours is electric, make sure it's unplugged from the mains supply or the batteries are removed.

If your mower runs on petrol, unplug the lead that is connected to the spark plug.


Begin by removing any grass clippings or debris from the mower's deck and undercarriage. Use a brush or cloth to clean these areas, paying special attention to the air filter and cooling fins.

Next, check for any signs of wear or damage on belts, cables, and other moving parts. Replace any worn components to prevent breakdowns during the mowing season.

Lawn Doctor recommends inspecting the spark plug for signs of wear or damage. If it looks worn, replace it to ensure easy starting and smooth running of your mower.


Sharpen Mower Blades


Sharp mower blades are essential for a clean cut and a healthy lawn. Dull blades can tear grass instead of cutting it, leading to a ragged appearance and potential lawn diseases.

To sharpen your blades, first remove them from the mower, following safety guidelines in your owner's manual. Use a file or grinding wheel to sharpen the cutting edge, maintaining the original angle.

Balance the blade after sharpening to ensure even cutting and reduce vibration. You can do this by placing the blade on a nail in the wall - if it stays level, it's balanced.

If you're not comfortable sharpening the blades yourself, many garden centres and hardware stores offer this service. Webb Garden Power provides a helpful guide on self-servicing your lawnmower, including blade sharpening.


Oil and Fuel Check


Proper oil and fuel maintenance is crucial for the longevity and performance of your lawnmower. Start by checking the oil level and condition.

If the oil looks dark or dirty, it's time for a change. Consult your owner's manual for the correct type and amount of oil to use. Remember to dispose of old oil responsibly at a recycling centre.

For petrol mowers, drain any old fuel from the tank and replace it with fresh petrol. Stale fuel can cause starting problems and damage the engine over time.

Moowy offers excellent advice on maintaining your lawnmower's engine, including oil and fuel checks, which are essential for optimal performance.


Summer Maintenance


Close-up of sunlit grass with dewdrops in a vibrant garden. Blurred house and trees in sunny background, evoking a serene morning mood.

During the peak mowing season, regular maintenance is key to keeping your lawnmower running smoothly and efficiently.


Regular Cleaning and Inspection


Frequent cleaning and inspection of your lawnmower during summer is vital for its performance and longevity. This routine helps prevent grass buildup and allows you to spot potential issues early.

After each use, clean the mower deck thoroughly. Use a brush or hose to remove grass clippings and debris. Be careful not to get water in the engine or electrical components if using a hose.

Regularly check the air filter and clean or replace it as needed. A clogged air filter can reduce engine performance and fuel efficiency.

Inspect the mower blades for signs of wear or damage. Sharp blades ensure a clean cut and reduce strain on the engine. Micks Mowers, The Mower Man on YouTube, provides comprehensive guides on lawnmower maintenance, including the importance of regular cleaning and inspection.


Mowing Techniques for Efficiency


Proper mowing techniques not only improve the health of your lawn but also increase the efficiency of your mower. Here are some tips to optimise your mowing:


  1. Mow when the grass is dry to prevent clumping and uneven cutting.

  2. Vary your mowing pattern each time to prevent soil compaction and encourage upright grass growth.

  3. Follow the "one-third rule": never cut more than one-third of the grass height in a single mowing session.


Overlapping your mowing rows slightly ensures you don't miss any patches. This technique also helps distribute grass clippings evenly.

For larger lawns, consider using a wider cutting deck to reduce mowing time.


Troubleshooting Common Issues


Even with regular maintenance, you may encounter some common lawnmower problems. Here's how to address them:


  • Mower won't start: Check the fuel level, spark plug, and air filter. Ensure the spark plug wire is securely connected.



  • Uneven cutting: This often indicates dull or damaged blades. Sharpen or replace the blades as needed.



  • Engine stalling: This could be due to a clogged air filter or carburettor. Clean or replace these components as necessary.



If you're experiencing vibrations while mowing, check for loose bolts or damaged blades. Tighten any loose parts and replace damaged components.

For more complex issues, consult your owner's manual or consider seeking professional help. These video guides on YouTube offer visual instructions for troubleshooting common lawnmower problems.



(This post includes affiliate links. If you purchase a product using our link, we may earn a small commission at no extra cost to you — it helps keep the Poppleton Post kettle on!)


Autumn and Winter Storage

As the mowing season comes to an end, proper storage is crucial to ensure your lawnmower is ready for the next spring.


End-of-Season Cleaning

Thorough cleaning at the end of the season is essential for preventing rust and ensuring your mower is ready for storage. Start by removing all grass clippings and debris from the mower deck and undercarriage.

Clean or replace the air filter to prevent dust and debris from entering the engine during storage. Wipe down all surfaces with a cloth to remove any remaining dirt or moisture.

For petrol mowers, run the engine until it's out of fuel or use a fuel stabiliser to prevent the fuel from degrading during storage. This step helps prevent carburettor issues when you start the mower next season.

Buy Spares provides a helpful checklist for end-of-season lawnmower maintenance, ensuring your mower is properly cleaned and prepared for storage.


Proper Storage Techniques

Correct storage is crucial for maintaining your lawnmower during the off-season. Here are some key steps to follow:


  1. Store the mower in a dry, covered area to protect it from the elements.

  2. If possible, store the mower on a level surface to prevent oil leakage.

  3. For petrol mowers, either empty the fuel tank or add a fuel stabiliser to prevent fuel degradation.


Cover the mower with a breathable cover to keep dust off while allowing any moisture to escape. This prevents rust and corrosion.

For battery-powered mowers, remove the battery and store it in a cool, dry place. Charge the battery periodically during storage to maintain its capacity.

EGO Power provides detailed guidelines on end-of-season storage for lawnmowers, which can help extend the life of your equipment.


DIY Mower Repair Tips


While some repairs require professional help, many common issues can be addressed with basic DIY skills. Here are some tips for simple mower repairs:


  • Changing the oil: Regularly changing the oil helps maintain engine performance. Consult your manual for the correct oil type and replacement procedure.

  • Replacing the spark plug: A worn spark plug can cause starting issues. Replace it annually or as recommended by the manufacturer.

  • Cleaning the carburettor: A dirty carburettor can cause engine problems. Clean it carefully using carburettor cleaner and a soft brush.


Always refer to your owner's manual before attempting any repairs. If you're unsure about a repair, it's best to consult a professional to avoid causing further damage.

For more advanced DIY repair tips, Lawn Doctor offers a comprehensive guide on lawnmower maintenance and repair.


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