How to Start a Lawn Mower That Has Been Sitting for Years: Best Tips and Tricks

Is your lawn mower gathering dust in the garage because it hasn’t been used in years? Don’t worry, you’re not alone. Many people find themselves in this situation, unsure of how to get their long-neglected mower up and running again. However, starting a lawn mower that has been sitting for years doesn’t have to be a daunting task.

With a little bit of know-how and some basic maintenance, you can bring your mower back to life and have your lawn looking pristine in no time. In this blog post, we’ll walk you through the steps to start a lawn mower that has been sitting idle for years. So, let’s dive in and get your mower back in action!

Introduction

Are you struggling to start your lawn mower after it has been sitting unused for years? It can be frustrating to deal with a mower that won’t start, but don’t worry, we’ve got you covered. Starting a lawn mower that has been sitting for years may require a few extra steps, but with a little bit of effort, you can have your mower up and running again in no time. In this article, we will guide you through the process of starting a lawn mower that has been sitting for years, from checking the fuel and spark plug to cleaning the carburetor and fuel system.

By following these steps, you’ll be able to breathe new life into your old mower and get back to enjoying a beautifully manicured lawn. So let’s get started!

The importance of proper maintenance

maintenance, importance of maintenance

Signs that your lawn mower needs some TLC

lawn mower, TLC, signs, needs, burstiness, perplexity, mower maintenance. Introduction: Keeping your lawn mower in tip-top shape is essential for maintaining a healthy and beautiful lawn. However, like any other machine, lawn mowers require regular maintenance and care to ensure they continue to operate effectively.

It’s important to keep an eye out for signs that your mower needs some TLC, as neglecting these warning signs can lead to costly repairs or even the need for a replacement. In this blog post, we will discuss the signs that indicate your lawn mower needs some attention and how you can give it the necessary burstiness and perplexity it deserves. So, grab a cup of coffee and let’s dive in!

Step 1: Preparing the Lawn Mower

So you finally decided to tackle that overgrown lawn, only to discover that your trusty old lawn mower has been sitting in the shed for years. Don’t worry, you’re not alone! Many people find themselves in this situation, but with a little bit of effort, you can have your lawn mower up and running in no time. The first step is to prepare the lawn mower for startup.

This involves a few simple tasks, such as checking the oil level, cleaning or replacing the spark plug, and inspecting the air filter. If you haven’t done so already, now is also a good time to fill up the gas tank with fresh fuel. Once you’ve completed these tasks, your lawn mower will be ready to go!

Gather the necessary tools and materials

lawn mower maintenance, tools and materials, preparing the lawn mower When it comes to maintaining your lawn mower, gathering the necessary tools and materials is the first step. You’ll need a few basic items to get started. First, make sure you have a set of wrenches, as you’ll likely need them to remove certain parts of the mower.

A socket set can also come in handy for loosening and tightening bolts. Next, a sturdy pair of gloves is essential for protecting your hands during the maintenance process. You’ll also want to have a clean cloth or rag on hand for wiping down any parts that may get dirty.

In addition, a can of compressed air is useful for blowing out any debris that may be clogging the mower’s air filter or cooling fins. Finally, make sure you have the necessary replacement parts, such as a new spark plug or air filter, depending on what maintenance tasks you’ll be performing. By gathering these tools and materials ahead of time, you’ll be well-prepared to tackle the task of preparing your lawn mower for the upcoming season.

Inspecting the exterior of the lawn mower

Preparing your lawn mower before use is essential to ensure it operates smoothly and efficiently. Before you even start cutting the grass, take a few moments to inspect the exterior of the mower. Look for any visible damage or wear and tear that may require attention.

Check the wheels to ensure they are properly attached and free from any debris that may hinder their movement. Inspect the handle to make sure it is securely fastened and comfortable to grip. Additionally, consider the height adjustment settings and make any necessary adjustments to suit your preferred cutting height.

By taking the time to prepare your lawn mower, you can ensure a safer and more effective mowing experience.

Checking the fuel and oil levels

Checking the fuel and oil levels is an essential first step in preparing your lawn mower for use. Just like a car, your lawn mower needs fuel and oil to operate efficiently. Before you start mowing, take a few minutes to check and top up these levels to ensure your mower is ready to tackle your yard.

First, let’s talk about fuel. Without fuel, your lawn mower won’t be able to start, let alone cut the grass. It’s important to make sure you have enough fuel in the tank before you begin mowing.

Start by locating the fuel tank on your mower. It’s typically located near the engine and should be easy to access. Check the fuel level by either looking at the gauge or opening the cap and visually inspecting the tank.

If the fuel level is low, it’s time to fill it up. Grab a container of fresh gasoline and carefully pour it into the tank. Be sure not to overfill it, as this can cause leakage and other issues.

Once the tank is filled, securely tighten the cap to prevent any spills. Now, you’re good to go! Next, let’s move on to the oil level. Like any engine, your lawn mower relies on oil to lubricate its moving parts and prevent friction and overheating.

Checking the oil level is a crucial part of maintenance and should be done regularly. Begin by locating the oil dipstick, which is usually located on the side or bottom of the engine. Pull out the dipstick and wipe it clean with a cloth or paper towel.

Step 2: Cleaning the Lawn Mower

Now that you’ve located your lawn mower and are ready to start it up after years of sitting idle, it’s important to give it a thorough cleaning before attempting to start the engine. Over time, dirt, grass clippings, and other debris can build up and clog the various components of your lawn mower, making it difficult for it to function properly. To clean your mower, start by removing any excess grass clippings from the deck and the housing using a brush or scraper.

Be sure to also clean out any grass clippings in the air filter and the spark plug area. Next, check the oil levels and change the oil if necessary. Dirty oil can hinder the mower’s performance and cause the engine to run poorly.

Finally, inspect the blades and sharpen or replace them if needed. Dull blades can tear the grass rather than cleanly cutting it, resulting in an uneven lawn. By following these steps and giving your lawn mower a thorough cleaning, you’ll increase its chances of starting up smoothly even after sitting for an extended period of time.

Removing dirt, debris, and grass clippings

“Removing dirt, debris, and grass clippings from your lawn mower is an essential part of maintaining its performance and longevity. After a hard day of mowing, your mower is likely to accumulate a fair amount of dirt, grass clippings, and other debris in and around its various components. Failure to clean your mower regularly can lead to clogged air filters, decreased engine performance, and even corrosion.

So, let’s dive into step 2 of our mower maintenance routine: cleaning the lawn mower. Begin by disconnecting the spark plug wire to prevent any accidental starts. Take a stiff brush or putty knife and carefully scrape away any dried grass clippings or dirt from the underside of the mower deck.

Pay close attention to the blade area and make sure it is free from any obstructions. Next, turn the mower on its side and use a garden hose or pressure washer to rinse off any remaining debris. Avoid spraying directly into the air intake or other sensitive areas.

Once the mower is clean and dry, use a rag or towel to wipe down the exterior, removing any excess water or dirt. Remember, a clean lawn mower is a happy lawn mower!”

Cleaning the air filter

“cleaning the air filter”

Emptying and cleaning the fuel tank

cleaning the lawn mower

Step 3: Replacing or Recharging the Battery

So, you’ve got a lawn mower that’s been sitting in the garage for years and now you’re wondering how to start it up again. One of the first things you’ll want to check is the battery. Over time, the battery may have lost its charge or even gone dead.

If that’s the case, you’ll need to either replace it or recharge it. If you choose to replace the battery, make sure you get a compatible one that matches the voltage and size requirements of your lawn mower. Installing the new battery is usually a straightforward process, just be sure to follow the manufacturer’s instructions.

If you opt to recharge the battery, you’ll need to remove it from the lawn mower and connect it to a battery charger. Leave it on the charger for several hours or until the battery is fully charged. Once the battery is charged or replaced, you can then try starting up your lawn mower.

Checking the battery’s voltage

car battery replacement, checking battery voltage, recharging a car battery

Charging the battery or replacing it if necessary

Replacing or recharging the battery is the third step to take when your battery is running low or not working properly. If you notice that your battery level is low, it’s essential to recharge it as soon as possible to keep your device functioning. Simply connect the charger to the device and an electrical outlet, and let it charge until it reaches full capacity.

However, if you find that your battery isn’t holding a charge anymore and is constantly dying, it may be time to replace it. Think of your battery as the life force of your device, just like a car battery keeps your car running smoothly. If it’s not working properly, you won’t be able to enjoy your device to its fullest potential.

Replacing the battery is similar to giving your device a fresh start, ensuring that it has the energy and power it needs to perform at its best. So, whether you need to recharge or replace your battery, taking care of this essential step will ensure that your device is always ready to use whenever you need it.

Step 4: Changing the Spark Plug

Starting a lawn mower that has been sitting idle for years can be a challenge, but with the right steps, you can get it up and running again. One important step in this process is changing the spark plug. Over time, the spark plug can become corroded or worn out, which can hinder the mower’s ability to start.

To change the spark plug, begin by locating it on the engine. It will be connected to a wire, which you will need to disconnect. Use a spark plug socket and a ratchet to remove the old spark plug from the engine.

Inspect the new spark plug to ensure it is the correct size and type for your mower. Then, use the socket and ratchet to install the new spark plug, making sure it is tightened securely. Reconnect the wire and you are ready to move on to the next step in getting your lawn mower back in action.

Locating the spark plug

spark plug

Removing and inspecting the spark plug

In order to change the spark plug, one must first remove and inspect it. This step is crucial because it allows you to assess the condition of the spark plug and determine if it needs to be replaced. To remove the spark plug, you will need a spark plug socket and a ratchet.

Start by disconnecting the spark plug wire from the spark plug. Next, insert the spark plug socket onto the spark plug and use the ratchet to loosen and remove the plug. Once removed, take a moment to inspect the spark plug.

Look for any signs of wear, such as a worn electrode or a buildup of deposits. These signs can indicate that the spark plug is no longer functioning properly and needs to be replaced. It’s also important to check the gap between the center and ground electrodes.

If the gap is too wide or too narrow, it can affect the performance of the spark plug. If you notice any issues during the inspection, it’s best to replace the spark plug with a new one.

Replacing the spark plug if needed

spark plug replacement As part of regular maintenance for your vehicle, you may need to replace the spark plug. The spark plug plays a crucial role in the ignition system of a car, as it creates the spark necessary to ignite the air-fuel mixture in the combustion chamber. Over time, spark plugs can become worn and dirty, which can lead to inefficient combustion and poor engine performance.

To replace the spark plug, you will need a spark plug socket, a ratchet, and possibly an extension. Start by locating the spark plug wires, which are usually connected to the top of the engine. Gently pull on the wire to disconnect it from the spark plug.

Next, use the spark plug socket and ratchet to loosen and remove the old spark plug. Inspect the spark plug for any signs of damage or wear. If it looks worn or damaged, it’s time for a replacement.

Before installing the new spark plug, make sure it is the correct type and gap for your vehicle. Use the spark plug socket and ratchet to tighten the new spark plug, being careful not to overtighten. Finally, reconnect the spark plug wire to the new spark plug.

Regularly replacing your spark plug can ensure optimal engine performance and fuel efficiency for your vehicle.

Step 5: Checking the Carburetor

Now that we’ve checked the fuel system and spark plug, it’s time to move on to the carburetor. The carburetor is responsible for mixing air and fuel to create the combustion needed to start the engine. If your lawn mower has been sitting for years, there’s a good chance that the carburetor may be clogged with old fuel and debris.

To check the carburetor, start by removing the air filter and inspecting it for any signs of dirt or damage. If the air filter is dirty, replace it with a new one. Next, locate the carburetor, which is usually located on the side or underneath the engine.

Check the carburetor for any visible signs of dirt or debris. If you see any, use a small brush or toothbrush to clean it off. If the carburetor is completely clogged, you may need to remove it and soak it in a carburetor cleaner for a few hours to remove any stubborn deposits.

Once the carburetor is clean, reinstall it and try starting the lawn mower again.

Cleaning the carburetor

In order to properly clean your carburetor, it’s important to thoroughly check it first. The carburetor is a crucial component of your engine’s fuel system, and it can often become clogged or dirty over time. One of the first things you should do when checking the carburetor is to visually inspect it for any signs of wear or damage.

Look for any cracks or leaks, as these can indicate that the carburetor needs to be replaced. Additionally, check the gaskets and seals to make sure they are in good condition. If you notice any issues, it’s best to replace them before proceeding with the cleaning process.

Once you’ve visually inspected the carburetor, it’s time to remove it from the engine and disassemble it. This will allow you to clean each individual component thoroughly. Use a carburetor cleaner and a soft brush to remove any dirt or debris from the surfaces.

Be careful not to damage any of the delicate parts. After cleaning, reassemble the carburetor and reinstall it back into the engine. Regularly checking and cleaning your carburetor will help to keep your engine running smoothly and efficiently.

So don’t neglect this important maintenance task!

Step 6: Refilling with Fresh Fuel

Now that you’ve successfully cleaned the spark plug and air filter, it’s time to move on to the next step: refilling the lawn mower with fresh fuel. When a lawn mower has been sitting for years, the fuel inside the tank can become stale and unfit for use. This can cause issues with starting the engine or even damage the internals of the mower.

To avoid these problems, it’s important to drain the old fuel and refill the tank with fresh gasoline. To start, locate the fuel tank on your lawn mower. This is usually located on the side or back of the mower, near the engine.

Once you’ve found it, carefully remove the cap to access the inside of the tank. Before draining the old fuel, it’s a good idea to place a container or gas can underneath the mower to catch the fuel. Next, locate the fuel line that connects the tank to the engine.

You may need to use a pair of pliers or a screwdriver to loosen any clamps or connectors holding the line in place. Once the line is disconnected, gently tilt the mower to pour out the old fuel into the container you’ve placed underneath. Once all the old fuel has been drained, it’s time to refill the tank with fresh gasoline.

Before doing so, it’s a good idea to check the owner’s manual for your lawn mower to determine the recommended type of gasoline to use. Using the wrong type of fuel can cause damage to the engine. Once you’ve determined the correct fuel type, slowly pour the fresh gasoline into the tank, being careful not to spill any.

After refilling the tank, securely fasten the cap back onto the fuel tank, making sure it is tightly sealed. This will prevent any fuel from leaking out during operation. Once the cap is secure, reconnect the fuel line to the engine, making sure it is attached tightly.

Draining the old fuel

Now that you’ve successfully drained the old fuel from your vehicle, it’s time to refill it with fresh fuel. This is an essential step in the process of rejuvenating your engine and ensuring optimal performance. Just like our bodies need nourishment to function properly, so does your car.

Imagine trying to run a marathon without proper fuel in your body – you wouldn’t get very far! The same concept applies to your vehicle. By refilling it with fresh fuel, you’re providing the necessary energy for it to run smoothly. Think of it as giving your car a healthy meal to keep it going strong.

So, go ahead and fill up your tank with clean, high-quality fuel, and get ready to hit the road with confidence!

Choosing the right type of fuel

Choosing the right type of fuel for your vehicle is crucial to its performance and longevity. One important step in this process is refilling your vehicle with fresh fuel regularly. By doing so, you ensure that your vehicle operates at its optimal level and avoids any potential problems that can arise from using stale or contaminated fuel.

Fresh fuel not only provides better efficiency and power but also helps to minimize the risk of engine damage. When refilling with fresh fuel, it is essential to pay attention to the octane rating recommended for your vehicle. The octane rating indicates the fuel’s ability to resist “knocking” or “pinging” during combustion.

Using the correct octane rating for your vehicle prevents knocking, which can lead to engine damage. Additionally, choosing a reputable fuel station will provide you with high-quality fuel that is less likely to contain impurities or contaminants. So, remember to refill your vehicle with fresh fuel regularly and consider the octane rating to ensure that you maintain optimal performance and avoid any potential engine troubles.

Refilling the fuel tank

refilling fuel tank, fresh fuel, step by step guide, fueling process. Now that you have successfully drained the old fuel from your tank, the next step is to refill it with fresh fuel. This may seem like a straightforward task, but there are a few important considerations to keep in mind.

First, make sure you are using the correct type of fuel for your vehicle. Consult your owner’s manual or speak with a professional if you are unsure. Using the wrong type of fuel can damage your engine and lead to costly repairs.

Before refilling, take a moment to inspect the fuel tank for any signs of damage or debris. It’s also a good idea to clean the fuel tank to ensure optimal performance. Once everything is in order, carefully pour the fresh fuel into the tank, taking care not to spill any.

Repeat this process until the tank is full. Now you are all set to hit the road with a full tank of fresh fuel!

Step 7: Priming the Lawn Mower

So, you’ve finally decided to tackle that overgrown lawn that’s been sitting untouched for years. But now you’re faced with the task of starting up your lawn mower, which hasn’t been used in ages. Don’t worry, we’ve got you covered.

One of the first steps to successfully starting a lawn mower that has been sitting for years is to prime the engine. The primer bulb, located on the side of the engine, is used to pump fuel into the carburetor and helps to get the engine running smoothly. To prime the engine, simply push the primer bulb several times until you notice resistance.

This will ensure that fuel is being pumped into the engine and will make starting the mower much easier. Remember, priming the lawn mower may take a few tries, especially if it hasn’t been used in a long time. So don’t give up if it doesn’t start right away.

Keep priming the engine until you notice fuel flowing through the carburetor, and soon enough, you’ll be ready to mow that lawn.

Priming the carburetor

Priming the carburetor of your lawn mower is an important step in getting it started. The carburetor is responsible for mixing air and fuel to create the necessary combustion for the engine to run smoothly. Without proper priming, the engine may struggle or fail to start altogether.

To prime the carburetor, locate the primer bulb on the side of the engine. It is usually a small, rubber button that you can press. Press the bulb several times until you feel resistance or see fuel flowing into the bulb.

This action helps fill the carburetor with fuel, making it easier to ignite. Why is priming necessary? Well, think of it like giving your engine a quick boost of energy. When you prime the carburetor, you are essentially supplying it with the fuel it needs to ignite and start the engine.

It’s like giving the engine a small dose of adrenaline to jumpstart the combustion process. Just like a car may struggle to start on a cold morning without a little gas in the tank, a lawn mower engine may struggle without a primed carburetor. By priming, you are ensuring that the engine has the necessary fuel to fire up and operate smoothly.

So, don’t forget to prime your lawn mower’s carburetor before starting it up. It may seem like a small step, but it can make a big difference in the performance and reliability of your mower. By taking a few extra seconds to prime, you’ll save yourself the frustration of a stubborn mower that doesn’t want to start.

Happy mowing!

Step 8: Starting the Lawn Mower

So, you finally decided to tackle that overgrown lawn, but there’s one problem – your lawn mower has been sitting in the garage for years. Don’t worry, with a little bit of effort and know-how, you can get that old mower up and running again. Here’s a step-by-step guide on how to start a lawn mower that has been sitting for years.

Firstly, you’ll want to check the fuel tank. If there’s old fuel in there, it’s best to drain it out and replace it with fresh gas. Old fuel can cause your mower’s engine to clog and prevent it from starting.

Once you’ve got fresh fuel in the tank, move on to the next step. Next, check the oil level in your mower. Over time, the oil can break down and become less effective.

Check the dipstick and if the oil is dark and dirty, it’s time for an oil change. Refer to your owner’s manual for specific instructions on how to change the oil in your particular mower model. After addressing the fuel and oil, it’s time to check the spark plug.

This small but significant component can often be the culprit of a mower that won’t start. Remove the spark plug and inspect it for any signs of damage or wear. If it looks worn out, it’s best to replace it with a new one.

If the spark plug appears to be in good condition, clean it with a wire brush to remove any built-up debris. Once you’ve checked these three vital areas, it’s time to give starting the mower a try. Prime the engine by pressing the primer bulb a few times, following the instructions in your owner’s manual.

Following the proper starting procedure

“The final step in starting your lawn mower is to follow the proper starting procedure. This will ensure that the mower starts smoothly and efficiently. To begin, make sure that the throttle is in the correct position, usually either fully open or halfway open.

Next, engage the safety features such as the parking brake and the blade engagement lever. This will prevent any accidents while starting the mower. Now, it’s time to turn the ignition key or pull the starter cord, depending on the type of lawn mower you have.

Remember to use a steady motion and to give the cord or key a firm pull. If the engine doesn’t start on the first try, don’t panic. Just wait a few seconds and try again.

Once the engine starts, let it run for a few minutes to warm up before engaging the blades and beginning to mow. Following the proper starting procedure will not only ensure that your lawn mower starts smoothly, but it will also help to prolong the life of your machine. So take your time, be patient, and before you know it, you’ll be out there enjoying a well-manicured lawn!”

Troubleshooting common starting issues

“starting issues with lawn mowers” Starting a lawn mower can sometimes be a tricky task, especially if you encounter any starting issues. In step 8 of troubleshooting common starting issues, it’s time to actually start the lawn mower. But before we dive into that, let’s recap the previous steps to ensure we’ve covered all the bases.

We’ve already checked the fuel level, inspected the spark plug, cleaned the air filter, made sure the throttle is in the correct position, checked the oil level, and primed the engine. Now, it’s time to start it up and get mowing! To start the lawn mower, make sure you are in a safe and open area with plenty of ventilation. It’s important to have enough space around you so that you can safely operate the mower without any obstacles.

Now, here comes the moment of truth – the starting process. First, locate the ignition switch or the pull start cord, depending on the type of lawn mower you have. For an electric start mower, simply turn the key to the “on” position, and then press the start button.

This should initiate the engine and get it running smoothly. If you have a pull-start mower, things are a little bit different. Position yourself next to the mower, and firmly hold onto the handle.

Now, here’s where a bit of strength comes in handy. With a swift and forceful pull, yank the cord towards you. This will engage the internal mechanisms and start the engine.

Remember, it might take a few attempts before the engine ignites, so don’t give up too easily. If you’re having trouble, double-check the previous troubleshooting steps to ensure everything is in order. Once the engine starts running, listen carefully for any unusual noises or vibrations.

Conclusion

In conclusion, starting a lawn mower that has been sitting for years is like reviving a long-forgotten friendship. It requires patience, a little coaxing, and a whole lot of determination. Just like how a good friend might need some time to warm up to you again, your lawn mower needs some TLC and attention before it’s ready to get back to work.

Remember, the key is to approach the situation with a clever combination of finesse and wit. First, give your mower a gentle pep talk to boost its confidence. Remind it of the good times you’ve had together and the grass it once proudly mowed.

Then, like a magician pulling a rabbit out of a hat, perform some maintenance magic. Clean out the fuel tank, change the spark plug, and give the carburetor a good old-fashioned scrub. Trust me, your lawn mower will be thinking, “Wow, they really went the extra mile for me!” Now, for the grand finale, let the charm of your wit come into play.

Sprinkle a dash of intelligence by priming the engine and giving it some fresh fuel. Stroke its ego by complimenting the shiny, new spark plug. Finally, confidently give the starter cord a firm tug, looking your mower straight in the “eyes” and saying, “You’ve got this, buddy!” And just like that, the engine will roar to life, reviving not only your lawn mower but also the memories of all the beautiful lawns it once conquered.

As you bask in the satisfaction of starting a dormant machine, you’ll realize that friendship truly knows no bounds – even when it comes to machinery. So go forth, fellow lawn enthusiasts, armed with this witty and clever guide, and breathe life back into your once-forgotten lawn mower! May your grass be green, your engine be strong, and your wit be ever sharp. Happy mowing!”

Importance of regular maintenance and care

Starting a lawn mower may seem like a simple task, but it is crucial to do it correctly in order to avoid any potential damage or accidents. Taking the time to follow the proper steps will not only ensure that your mower starts smoothly, but it will also help to prolong its lifespan. Step 8 in starting a lawn mower is an important one: priming the engine.

This involves pumping a small amount of fuel into the carburetor to create an air/fuel mixture that is easily combustible. By doing this, you are essentially giving your mower a little boost to get it up and running. Think of it as giving your car a quick jumpstart when the battery is low.

By priming the engine, you are increasing its chances of starting on the first try. So, before you start pulling on the recoil cord, take a moment to locate the primer bulb on your mower. Give it a few pumps to inject the fuel and get the engine ready.

It may seem like a small step, but it can make a big difference in the overall performance of your lawn mower.

FAQs

How long has the lawn mower been sitting idle?
If the lawn mower has been sitting for years, it might require some extra effort to get it started.

What should I check before starting a lawn mower that has been sitting for years?
Before starting a lawn mower that has been sitting idle for years, you should check the fuel level, spark plug, air filter, and oil level.

Can I use the old fuel in a lawn mower that has been sitting for years?
It is recommended to drain the old fuel and replace it with fresh fuel before starting a lawn mower that has been sitting idle for years.

How can I clean the spark plug on a lawn mower that has been sitting for years?
To clean the spark plug on a lawn mower that has been sitting idle for years, you can remove it and use a wire brush to clean off any debris or residue.

Do I need to replace the air filter in a lawn mower that has been sitting for years?
It is a good idea to check the air filter and replace it if it is dirty or damaged when starting a lawn mower that has been sitting idle for years.

Should I check the oil level in a lawn mower that has been sitting for years?
Yes, it is important to check the oil level in a lawn mower that has been sitting idle for years and top it up if necessary.

What steps should I take to properly start a lawn mower that has been sitting for years?
To start a lawn mower that has been sitting idle for years, you should ensure the fuel tank is filled with fresh fuel, the spark plug is clean, the air filter is in good condition, and the oil level is sufficient. Pull the starting cord slowly and steadily, and if necessary, use a primer bulb or choke to assist with starting.