The sweet scent of freshly cut grass, the satisfying whirring of the mower, and the pristine look of a well-maintained lawn – all of these are part of the joy of owning a lawnmower. However, even the best lawnmower can lose its sharpness over time, leading to uneven cuts, torn grass, and a less-than-perfect lawn. The culprit? Dull blades.
But don’t fret! Replacing your lawn mower blades is a simple task that can be done by anyone with a few basic tools and a little patience. This comprehensive guide will walk you through every step, from choosing the right blades to safely installing them, ensuring you can get back to enjoying that perfectly manicured lawn in no time.
Why Do I Need to Change My Lawn Mower Blades?
Dull blades are the enemy of a beautiful lawn. They rip and tear at the grass, leading to a messy, uneven cut and potentially causing damage to your lawn. Here are some signs that your blades need replacing:
- Uneven or ragged cuts: If you notice that your lawnmower is leaving behind a messy, uneven cut, it’s a clear sign that the blades are dull.
- Torn grass: If you see torn grass blades, it’s a sure sign that your mower blades are too dull and are ripping through the grass instead of slicing it cleanly.
- Excessive vibration: If your lawnmower vibrates excessively while mowing, it could be a sign of worn or damaged blades.
By changing your blades regularly, you can ensure a clean, even cut, a healthier lawn, and a smoother mowing experience.
Choosing the Right Blades
The first step to changing your lawnmower blades is selecting the right ones. Different lawnmowers require different blade types, so it’s crucial to choose blades that are compatible with your model.
1. Identifying Your Lawn Mower Type
- Rotary mowers: These are the most common type of lawnmower and use blades that spin horizontally to cut the grass.
- Reel mowers: These use a set of rotating blades to cut the grass. They offer a very clean cut but require more maintenance.
2. Matching the Blade to Your Mower
Once you know the type of lawnmower you have, you can choose the correct blades. Here’s what to look for:
- Blade size: The blades should match the size of your lawnmower’s deck.
- Blade design: Some blades are designed for specific tasks, such as mulching or side discharge.
- Material: High-quality blades are usually made from hardened steel.
- Compatibility: Ensure the blades you choose are compatible with your lawnmower model. Check your owner’s manual for specific recommendations.
Preparing for the Blade Change
Now that you’ve chosen the right blades, it’s time to prepare for the change. Here’s what you’ll need:
- New lawnmower blades
- Work gloves
- Safety glasses
- Socket wrench (size will vary based on your mower model)
- A block of wood or a heavy object
- Cleaning cloth
- Optional: A blade balancer
It’s important to ensure safety is your top priority.
1. Disconnecting the Spark Plug
Before working on your lawnmower, you must disconnect the spark plug wire to prevent accidental starting. This will ensure that the engine cannot accidentally start while you’re working on the blades.
2. Preparing the Mower
- Turn off the mower and unplug it from any power source.
- Allow the mower to cool down completely before you begin working on it.
The Steps to Change Your Lawn Mower Blades
Now, let’s get to the core of the process:
1. Remove the Old Blades
- Locate the blade bolts: These are usually located underneath the deck of the mower.
- Place the mower on a stable surface: Ensure the mower is resting on a flat surface.
- Use the socket wrench to loosen the bolts: Turn the bolts counter-clockwise to loosen them.
- Use the block of wood to support the blade: Once the bolts are loosened, place the block of wood underneath the blade to prevent it from falling.
- Remove the bolts and blades: Once the bolts are fully removed, carefully lift the blade off the mower.
2. Installing the New Blades
- Align the new blades: Make sure the blades are properly aligned with the mounting holes.
- Install the new blades: Position the new blades onto the mounting posts.
- Secure the blades with the bolts: Place the bolts back into the holes and tighten them with the socket wrench, turning them clockwise.
- Tighten the bolts evenly: Ensure the bolts are tightened evenly to prevent the blades from becoming loose.
3. Balancing the Blades
- Optional step: If you have a blade balancer, use it to balance the new blades.
- Balancing importance: Balanced blades will reduce vibration and ensure a clean cut.
4. Cleaning the Deck
- Clean the deck: Wipe the deck with a cleaning cloth to remove any debris.
- Check for damage: Inspect the deck for any damage or wear.
5. Reconnecting the Spark Plug Wire
- Reconnect the spark plug wire: Plug the spark plug wire back into the spark plug.
Finishing Touches
- Start the mower: Start the mower and let it run for a few minutes to ensure the blades are running smoothly.
- Inspect for any issues: While the mower is running, inspect for any unusual noises or vibrations.
- Test the cut: Once you’re confident the blades are installed correctly, test the cut on a small patch of grass.
Important Safety Tips:
- Always disconnect the spark plug wire before working on the lawnmower.
- Wear safety glasses and work gloves to protect your eyes and hands.
- Use a block of wood to support the blade while loosening the bolts.
- Be careful when handling the blades – they are sharp!
- Ensure the bolts are tightened evenly to prevent the blades from becoming loose.
- Check the blades for damage or wear before each use.
Conclusion:
Changing your lawn mower blades is a simple and necessary maintenance task that will ensure a clean, even cut and a healthier lawn. With this comprehensive guide, you can confidently change your blades, saving money on costly repairs and getting back to enjoying the beauty of a freshly mowed lawn. Remember, always prioritize safety and follow the steps carefully. With a little patience and effort, you can keep your lawnmower running smoothly and your lawn looking its best.
FAQ
How often should I change my lawn mower blades?
You should change your lawn mower blades at least once a year, or more often if you notice any damage or dullness. This will ensure that your mower cuts cleanly and efficiently, and prevent damage to your lawn. A good rule of thumb is to check the blades before each mowing season and replace them if they show any signs of wear or tear.
What kind of blade should I use?
The type of blade you need will depend on the type of lawn mower you have. Rotary mowers use standard blades, while reel mowers use special blades designed for their specific mechanism. If you’re not sure what type of blade you need, consult your owner’s manual or a lawn care professional. It’s important to choose a blade that is compatible with your mower model and designed for the specific type of grass you have.
What tools do I need to change my lawn mower blades?
You will need a few basic tools to change your lawn mower blades, including a socket wrench, a screwdriver, and a pair of work gloves. You may also need a blade removal tool, which is specifically designed to remove and install lawn mower blades.
It’s a good idea to also have safety goggles and a pair of work boots on hand to protect your eyes and feet from any debris or sharp objects.
How do I remove the old blade?
Before you start, unplug the mower or disconnect the spark plug to prevent any accidental starts. Then, locate the blade bolt and use a socket wrench to loosen and remove it. Once the bolt is removed, the blade should come off easily.
If the blade is stuck, you may need to use a blade removal tool to help pry it off. Be careful not to damage the mower deck while removing the blade.
How do I install the new blade?
Before you install the new blade, make sure it is sharp and clean. To install the blade, align it with the blade bolt and then tighten the bolt securely.
It’s essential to tighten the bolt to the manufacturer’s specifications. If it’s not tightened enough, the blade may come loose and cause damage.
How do I know if my new blades are sharp enough?
To check the sharpness of your new blades, run your finger along the edge of the blade. If you feel a sharp edge, the blades are sharp enough. If you feel a dull edge, you may need to sharpen the blades or replace them with new ones.
A sharp blade will cut cleanly and efficiently, resulting in a healthier lawn and less strain on your mower.
What are some safety precautions I should take when changing my lawn mower blades?
Changing lawn mower blades can be dangerous if you’re not careful. Always disconnect the spark plug or unplug the mower before attempting any repairs. Be sure to wear safety glasses, gloves, and closed-toe shoes to protect yourself from injury.
Never attempt to change the blades on a running mower, and always use the proper tools and techniques. If you are not comfortable changing your lawn mower blades yourself, it’s best to seek professional assistance.