The warm weather has finally arrived, and you’re ready to tackle your lawn. Your trusty John Deere L120 lawn mower is waiting in the shed, but you can’t remember how to start it. Don’t worry, you’re not alone. Many homeowners face this challenge every spring. This comprehensive guide will walk you through the process of starting your John Deere L120, from pre-start checks to troubleshooting common issues. Whether you’re a seasoned lawn care professional or a novice, this step-by-step approach will ensure your lawn mower is ready to tackle the grass.
Starting a John Deere L120 in a Nutshell
To start a John Deere L120 lawn mower, you’ll need to follow a sequence of steps:
- Prepare the mower: This includes checking the oil level, adding fuel, and ensuring the blades are sharp.
- Prime the engine: This is a crucial step, especially if the mower has been sitting idle for a while.
- Engage the choke: This will help the engine start more easily in cold conditions.
- Start the engine: You can use either the electric starter or the recoil start mechanism.
- Disengage the choke: Once the engine is running, disengage the choke to allow it to run smoothly.
Let’s delve deeper into each step to ensure a successful lawn mowing experience.
Pre-Start Checks
Before you even attempt to start your John Deere L120, it’s essential to perform a few basic checks:
1. Checking the Oil Level
Why is this important?
The oil lubricates the engine, preventing wear and tear. Low oil levels can lead to engine damage, so it’s vital to ensure the oil is at the appropriate level.
How to check the oil level:
- Locate the dipstick: It’s usually marked with a yellow handle and located near the engine.
- Remove the dipstick and wipe it clean: This will give you an accurate reading.
- Re-insert the dipstick fully and remove it again: The oil level should be between the “Full” and “Add” marks.
- Add oil if needed: Use the recommended oil type for your John Deere L120. Consult your owner’s manual for the correct oil type and viscosity.
2. Adding Fuel
Why is this important?
Fuel is the lifeblood of your engine. Without enough fuel, your mower won’t start.
How to add fuel:
- Locate the fuel tank cap: It’s usually red and located on the side of the mower.
- Unscrew the cap and carefully add fresh fuel: Use unleaded gasoline with an octane rating of 87 or higher.
- Don’t overfill the tank: Leave a small gap at the top to allow for fuel expansion.
- Tighten the fuel cap securely: This prevents leaks and spills.
3. Inspecting the Blades
Why is this important?
Sharp blades ensure a clean cut and prevent damage to your lawn. Dull blades can tear the grass, leaving it looking uneven and promoting disease.
How to inspect the blades:
- Remove the blade: Use a wrench to loosen and remove the blade nut.
- Inspect the blade for dullness or damage: If the blade is dull or chipped, it needs sharpening or replacement.
- Sharpen the blade: You can sharpen the blade using a file or take it to a lawn mower repair shop.
- Reinstall the blade: Ensure it’s properly seated and tighten the blade nut securely.
Starting the Engine
With the pre-start checks complete, you’re ready to start the engine. Here’s how:
1. Prime the Engine
Why is this important?
Priming helps deliver fuel to the carburetor, making it easier to start the engine. This step is especially crucial if the mower has been sitting idle for a long time.
How to prime the engine:
- Locate the primer bulb: It’s usually red and located near the carburetor.
- Pump the bulb several times: The number of pumps required will vary depending on the model. Consult your owner’s manual for specific instructions.
2. Engage the Choke
Why is this important?
The choke enriches the fuel-air mixture, allowing the engine to start more easily in cold conditions.
How to engage the choke:
- Locate the choke lever: It’s usually a red lever located near the handle.
- Move the lever to the “choke” position: This will restrict airflow to the engine.
3. Start the Engine
How to start the engine:
Using the Electric Starter:
- Insert the key: Turn the key to the “start” position.
- Press the starter button: The engine should crank and start.
- Release the key once the engine starts: The engine should idle smoothly.
Using the Recoil Start:
- Pull the recoil cord slowly until you feel resistance: This helps engage the starter mechanism.
- Pull the cord quickly and firmly: The engine should start.
- Continue pulling the cord until the engine starts: If it doesn’t start on the first pull, try again.
4. Disengage the Choke
Why is this important?
Once the engine is running, you need to disengage the choke to allow the engine to run smoothly.
How to disengage the choke:
- Locate the choke lever: It’s usually a red lever located near the handle.
- Move the lever to the “run” position: This will allow air to flow freely into the engine.
Troubleshooting Common Starting Problems
Sometimes, even with the correct procedures, your John Deere L120 might not start. Here are some common starting problems and their potential solutions:
1. No Spark
Possible Causes:
- Dead battery: Check the battery terminals for corrosion and ensure the battery has a good charge.
- Faulty spark plug: Inspect the spark plug for wear or damage. Replace the spark plug if needed.
- Faulty ignition system: This may require the assistance of a qualified mechanic.
Solutions:
- Charge or replace the battery: Use a battery charger or replace the battery if necessary.
- Replace the spark plug: Ensure you use the correct spark plug type for your model.
- Consult a mechanic: If you suspect an issue with the ignition system, it’s best to seek professional help.
2. No Fuel
Possible Causes:
- Empty fuel tank: Check the fuel level and add fuel if needed.
- Clogged fuel line: Inspect the fuel line for blockages.
- Faulty fuel pump: This may require a mechanic to diagnose and repair.
Solutions:
- Add fuel to the tank: Use fresh, unleaded gasoline.
- Clean the fuel line: Use a fuel line cleaner or replace the fuel line if necessary.
- Consult a mechanic: If you suspect a faulty fuel pump, it’s best to seek professional assistance.
3. Engine Won’t Stay Running
Possible Causes:
- Dirty carburetor: A dirty carburetor can prevent the proper flow of fuel and air.
- Air leak: A leak in the air intake system can cause the engine to stall.
- Faulty fuel filter: A clogged fuel filter can restrict fuel flow.
Solutions:
- Clean the carburetor: This may require disassembly and cleaning. Consult your owner’s manual or a repair guide for specific instructions.
- Inspect for air leaks: Check for any loose connections or cracks in the air intake system.
- Replace the fuel filter: Use a fuel filter specifically designed for your model.
Safety Precautions
Safety should always be your top priority when operating a lawn mower. Here are some essential safety precautions to keep in mind:
- Always wear safety glasses: This will protect your eyes from debris and flying objects.
- Wear sturdy shoes: This will prevent injuries from falling objects or sharp blades.
- Avoid wearing loose clothing or jewelry: These can get caught in the moving parts of the mower.
- Never operate the mower on slopes: This increases the risk of tipping over.
- Be aware of your surroundings: Look out for children, pets, and obstacles.
- Never leave the mower unattended while it’s running: Always turn off the engine and remove the key before leaving the mower.
Conclusion
Starting your John Deere L120 lawn mower doesn’t have to be a daunting task. By following these steps and addressing common problems, you can ensure your mower is ready to tackle your lawn with ease. Remember to prioritize safety and consult your owner’s manual for specific instructions and troubleshooting tips for your model. With a little knowledge and a few simple steps, you can get your John Deere L120 running smoothly and enjoy a well-maintained lawn all season long.
FAQs
1. How do I start a John Deere L120 lawn mower for the first time?
The first time you start your John Deere L120, you’ll need to prime the engine. This allows fuel to flow to the carburetor, making it easier to start. To prime the engine, press the primer bulb located on the carburetor 5-6 times. Once primed, you can turn the key to the “Start” position and hold it there until the engine fires. If the engine doesn’t start, make sure the choke is in the “On” position and try again. Once the engine is running, you can move the choke lever to the “Off” position.
2. What type of fuel should I use in my John Deere L120 lawn mower?
You should always use unleaded gasoline with a minimum octane rating of 87 in your John Deere L120. It’s also essential to use fresh gasoline and avoid using fuel that’s been sitting for more than 30 days, as it can degrade and gum up the engine. Additionally, you should never use gasoline with ethanol content higher than 10% as it can damage the fuel system.
3. How do I adjust the cutting height on my John Deere L120 lawn mower?
Adjusting the cutting height on your John Deere L120 is simple. You’ll find a lever or lever system located on the mower deck, usually near the front. This lever is connected to a series of pins that control the height of the deck. To change the height, simply pull the lever out and move it to the desired height setting, then push the lever back in to secure the setting.
4. How do I change the oil in my John Deere L120 lawn mower?
Changing the oil in your John Deere L120 is essential for maintaining the engine’s health. Start by warming up the engine for a few minutes. Then, locate the oil drain plug on the bottom of the engine block. Place a drain pan under the plug and carefully loosen it, allowing the oil to drain completely. Once the oil has drained, replace the drain plug and tighten it securely. Now, locate the oil fill cap on the top of the engine and pour in the recommended amount of oil for your model, as specified in the owner’s manual.
5. How do I clean the air filter in my John Deere L120 lawn mower?
Cleaning the air filter in your John Deere L120 is important for ensuring proper engine performance. To clean the air filter, first, locate the air filter housing, which is typically located on top of the engine. Open the housing and remove the air filter. If it’s a paper filter, you can tap it against a solid surface to remove loose debris. If it’s a foam filter, you can wash it with soapy water and allow it to dry completely before reinstalling it.
6. How often should I maintain my John Deere L120 lawn mower?
Maintaining your John Deere L120 is essential for its longevity and optimal performance. Regular maintenance includes checking the oil level, cleaning the air filter, sharpening the blades, and inspecting the belts and hoses. You should perform a basic check-up after every use and schedule a more thorough maintenance routine at least once a season. Refer to the owner’s manual for specific maintenance schedules and recommendations.
7. Where can I find the owner’s manual for my John Deere L120 lawn mower?
If you can’t find your John Deere L120 owner’s manual, you can easily access it online. Visit the John Deere website and search for “L120 owner’s manual.” You can also find the manual through a simple online search using keywords like “John Deere L120 manual” or “John Deere L120 owner’s manual PDF.” The owner’s manual provides detailed information about your lawn mower, including its features, specifications, operation, maintenance, and troubleshooting tips.