The satisfying “clunk” and “whirr” of a pull-string lawn mower starting up is a nostalgic sound for many. However, for those who haven’t wielded one in a while, or are new to the world of manual lawn care, getting that engine roaring can be a bit of a mystery. This article will walk you through the process of starting a pull-string lawn mower, from pre-start checks to troubleshooting common problems.
Starting a pull-string lawn mower involves a series of steps, from ensuring the engine is ready to go to the actual pull-start procedure. It requires a bit of physical effort and a touch of finesse, but with the right technique, you’ll be mowing your lawn in no time.
Pre-Start Preparations: Getting Your Lawn Mower Ready
Before you even attempt to pull the starting cord, there are a few essential steps to ensure your lawn mower is ready to operate smoothly:
1. Check the Fuel and Oil Levels
- Fuel: Your lawn mower needs gasoline to run. Check the fuel tank and make sure it’s filled with fresh, clean gasoline. Avoid using gasoline that’s been sitting around for a long time, as it can degrade and cause engine problems.
- Oil: The engine needs oil to lubricate its moving parts and prevent damage. Consult your owner’s manual for the correct type and amount of oil for your specific mower model. Check the oil level using the dipstick, and add oil if necessary.
2. Inspect the Air Filter
A clean air filter allows the engine to breathe properly. Remove the air filter cover and inspect the filter element. If it’s dirty, replace it with a new one. You can also clean a reusable air filter by tapping it against a hard surface or using compressed air to remove any debris.
3. Check the Spark Plug
The spark plug is responsible for igniting the air-fuel mixture in the engine. If it’s fouled or damaged, it won’t fire properly. You can inspect the spark plug by removing it with a wrench. If the tip is black or oily, or the electrode gap is too wide, you’ll need to clean it or replace it.
4. Ensure the Blades are Sharp
Sharp blades are essential for a clean cut and efficient mowing. If the blades are dull, they’ll tear the grass instead of cutting it, leaving your lawn looking ragged. Sharpen your blades using a file or a sharpening stone, or replace them if they’re too worn.
The Pull-Start Procedure: Getting the Engine Going
With your lawn mower prepped and ready, it’s time to start it:
1. Prime the Engine (If Necessary)
Some lawn mowers have a primer bulb, which helps introduce fuel into the carburetor when starting a cold engine. If your mower has a primer bulb, press it several times to fill the carburetor with fuel.
2. Set the Choke (If Necessary)
The choke restricts airflow to the engine, helping it start in cold conditions. If your mower has a choke lever, set it to the choke position (usually a full choke) before starting.
3. Engage the Blade Clutch
Before starting the engine, make sure the blade clutch is engaged. This prevents the blades from spinning while you’re trying to start the engine. On most lawn mowers, this is a lever on the handle, which you’ll pull to disengage the blades.
4. Pull the Starting Cord Slowly at First
Hold the starting cord handle firmly with one hand, and place your other hand on the handle of the lawn mower for stability. Pull the cord slowly at first, feeling the resistance as you build up tension. This helps prime the engine and ensures the cord doesn’t recoil too quickly.
5. Pull the Cord with a Quick, Strong Jerk
Once you’ve built up tension, pull the cord with a quick, strong jerk. The goal is to generate enough momentum to turn the engine over and ignite the air-fuel mixture. Don’t be afraid to pull the cord forcefully, but be careful not to injure yourself.
6. Release the Choke (If Necessary)
Once the engine starts, you can gradually release the choke lever, if your mower has one. This will increase airflow to the engine, helping it run smoothly.
7. Disengage the Blade Clutch
Once the engine is running smoothly, you can disengage the blade clutch by releasing the lever on the handle. The blades will now be spinning, ready to mow your lawn.
Troubleshooting Common Problems
While the starting process is relatively straightforward, sometimes things can go wrong. Here are some common issues and how to address them:
1. The Engine Won’t Start at All
- Check the fuel level. Make sure the fuel tank has enough gasoline.
- Check the spark plug. Remove the spark plug and inspect it for signs of fouling or damage.
- Check the air filter. A dirty air filter can restrict airflow and prevent the engine from starting.
- Check the choke. Make sure the choke is set correctly, especially in cold weather.
- Check the starting cord. Ensure it’s properly attached to the engine and not worn or frayed.
2. The Engine Starts But Won’t Stay Running
- Check the choke. If you’ve started the engine with the choke engaged, release it slowly once it’s running.
- Check the air filter. A dirty air filter can cause the engine to stall.
- Check for fuel leaks. A fuel leak can starve the engine of fuel.
3. The Engine Starts and Runs, But the Blades Don’t Turn
- Check the blade clutch. Make sure it’s engaged by pulling the lever on the handle.
- Check the blade belt. The belt may be worn or broken, preventing the blades from spinning.
Essential Safety Tips
- Always wear safety glasses and protective footwear when operating a lawn mower.
- Never operate a lawn mower on a slope.
- Never leave a running lawn mower unattended.
- Keep children and pets away from the area where you’re mowing.
- Before starting the engine, make sure the area around the lawn mower is clear of debris.
- Never try to start the engine if the lawn mower is tipped over.
- Always shut off the engine and disconnect the spark plug wire before performing any maintenance.
Conclusion: Mastering the Pull String Lawn Mower
Starting a pull-string lawn mower may seem daunting at first, but with the right technique and a little patience, you’ll be a mowing master in no time. Remember to perform the pre-start checks, follow the pull-start procedure carefully, and always prioritize safety. And don’t forget to enjoy the satisfying feeling of a job well done!
FAQ
1. What are the steps to starting a pull string lawn mower?
Starting a pull string lawn mower is a simple process. First, ensure the fuel tank has enough gasoline. Then, set the choke to the “choke” position, which helps enrich the fuel mixture for easier starting. Next, prime the carburetor by pressing the primer bulb several times. This injects fuel into the engine. Now, make sure the mower blade is disengaged by holding the blade control lever.
Finally, with the mower on a flat surface, pull the starter cord briskly and firmly. If the engine doesn’t start, try again a few times. If it still doesn’t start, check the fuel level, the choke setting, and the spark plug for any problems.
2. How do I prime a lawn mower?
Priming a lawn mower is crucial for delivering fuel to the engine before starting. Locate the primer bulb, usually a small round bulb near the carburetor. Press the primer bulb several times to fill the carburetor with fuel. The number of times you need to press it depends on the specific mower model, but 4-6 presses are usually sufficient. You’ll know it’s primed when you feel resistance when pressing the bulb.
Over-priming can flood the engine, so don’t press the bulb excessively. If the engine doesn’t start after priming, check for any fuel leaks or other issues.
3. What should I do if the lawn mower won’t start?
If your lawn mower won’t start, several things could be wrong. First, ensure the fuel tank has enough gasoline and the fuel line isn’t blocked. Check the choke position, making sure it’s set to the “run” position after starting the engine. Verify the spark plug is clean and connected properly, and test it with a spark plug tester if necessary.
Also, inspect the air filter for dirt and debris, as a clogged air filter can prevent proper airflow. Lastly, ensure the blade control lever is disengaged, allowing the engine to start without the blade running.
4. What should I do if the lawn mower backfires?
A backfire can be alarming, but it usually means there’s a problem with the engine. Check the air filter for dirt and debris, as a clogged air filter can cause backfires. Make sure the choke is in the “run” position after the engine has started. Inspect the spark plug for any damage or carbon buildup, as these can cause backfires.
Finally, consider the quality of the fuel. Old or stale gasoline can lead to backfires, so use fresh gasoline and store it properly. If the backfire persists, it’s best to consult a qualified mechanic.
5. How often should I change the oil in my lawn mower?
Changing the oil in your lawn mower is important for maintaining its performance and lifespan. Generally, you should change the oil every 25 hours of use or at least once a year, depending on the manufacturer’s recommendations. Check your owner’s manual for specific instructions.
Changing the oil involves draining the old oil, replacing the oil filter (if applicable), and refilling with fresh oil. Ensure you use the correct type of oil recommended for your mower.
6. How do I safely operate a lawn mower?
Operating a lawn mower safely is paramount. Always wear appropriate clothing, including long pants, closed-toe shoes, and eye protection. Never operate the mower on slopes, as it can be dangerous. Be aware of your surroundings, and avoid mowing near people, pets, or objects.
Keep the mower in good working condition and inspect it for any damage before each use. Always unplug the spark plug wire before performing any maintenance or repairs. Finally, never leave a running mower unattended.
7. What should I do with the lawn mower after I’m finished mowing?
After finishing mowing, ensure the engine has completely cooled down before storing the mower. Clean the mower deck, removing any grass clippings or debris. Check for any loose parts or damage.
Next, drain the fuel tank if you’re not using the mower for an extended period. This prevents the fuel from degrading and clogging the carburetor. Finally, store the mower in a dry and ventilated area, protecting it from moisture and dust.