Running out of gas while mowing the lawn is a common and frustrating experience. It can halt your progress, leaving you with an unfinished yard and a non-functional mower. However, restarting your mower after it’s run dry is usually a straightforward process, though it does require a few key steps and a bit of patience. This guide will walk you through everything you need to know to get your mower running again efficiently and safely.
Understanding Why Your Mower Won’t Start
Before diving into the restart process, it’s important to understand why your mower refuses to start after running out of gas. The most obvious reason, of course, is that the engine isn’t receiving any fuel. However, the situation can be a bit more complex.
When a mower runs out of gas, the fuel lines and carburetor can become completely empty. This means that the fuel pump (if your mower has one) has to work to draw fuel all the way from the tank, through the lines, and into the carburetor. This process can take some time and may require several attempts to start the engine. Additionally, running the engine dry can sometimes introduce air into the fuel system, which further complicates the restart process.
Another important aspect is the condition of the other components. If your mower has a dirty air filter, a fouled spark plug, or old fuel, it might be harder to start even after refueling. These factors can exacerbate the problem and make the restarting process more challenging. Addressing these potential issues proactively will help ensure a smoother start.
Essential Steps to Restart Your Mower
Getting your mower running again after it runs out of gas involves a series of essential steps. Follow these carefully to avoid damaging your engine and to ensure a successful restart.
Step 1: Refueling Your Mower
The first and most obvious step is to refuel your mower. Always use the correct type of gasoline recommended by the manufacturer. This information can usually be found in your mower’s owner’s manual or on a sticker near the fuel tank. Using the wrong type of fuel can damage your engine.
When refueling, be sure to pour the gas slowly and carefully to avoid spills. Overfilling the tank can also cause problems, so stop when the fuel level reaches the recommended fill line. It’s also a good idea to use fresh gasoline. Gasoline can degrade over time, especially if it’s stored improperly. Old or stale gasoline can make it difficult to start your mower.
Step 2: Priming the Engine
Priming the engine is a critical step in getting fuel into the carburetor. Most lawn mowers have a primer bulb, a small rubber or plastic bulb that you press several times to draw fuel from the tank into the carburetor.
Locate the primer bulb on your mower. It’s usually near the carburetor or on the engine housing. Press the bulb firmly and deliberately several times. Typically, three to five presses are sufficient. Avoid pressing the bulb excessively, as this can flood the engine and make it even harder to start.
If your mower doesn’t have a primer bulb, it might have a choke lever. The choke restricts airflow to the carburetor, creating a richer fuel mixture that’s easier to ignite. If your mower has a choke, move the choke lever to the “choke” position.
Step 3: Setting the Throttle and Starting the Engine
Once you’ve refueled and primed the engine, it’s time to start the mower. Set the throttle to the recommended starting position. This is usually marked on the throttle control with a symbol or label such as “Start” or “Fast.”
Now, pull the starter cord firmly and smoothly. Avoid jerking or yanking the cord, as this can damage the starter mechanism. If the engine doesn’t start on the first pull, let the cord retract fully and try again. It may take several pulls to get the engine running, especially if the fuel lines were completely empty.
If your mower has an electric start, simply turn the key or press the start button after setting the throttle.
Step 4: Adjusting the Choke (If Applicable)
If your mower has a choke and you used it to start the engine, you’ll need to adjust it once the engine is running. After the engine starts, gradually move the choke lever towards the “run” or “open” position. If you move the choke too quickly, the engine may stall.
Listen to the engine as you adjust the choke. If it starts to sound rough or sputter, move the choke back slightly. The goal is to find the position where the engine runs smoothly and consistently.
Step 5: Allowing the Engine to Warm Up
Once the engine is running smoothly, allow it to warm up for a few minutes before resuming mowing. This will help ensure that the engine is properly lubricated and that it runs efficiently. Warming up the engine also helps prevent stalling and reduces wear and tear on the engine components.
Troubleshooting Common Starting Problems
Even after following the steps above, you might still encounter problems starting your mower. Here are some common issues and how to address them.
Engine Flooding
Flooding occurs when there’s too much fuel in the engine. This can happen if you over-primed the engine or if the choke is stuck in the “closed” position.
To clear a flooded engine, remove the spark plug and pull the starter cord several times to vent the excess fuel. Allow the cylinder to air out for a few minutes before replacing the spark plug. You can also try starting the engine with the throttle in the “fast” position and without using the choke or primer.
Dirty Air Filter
A dirty air filter restricts airflow to the engine, making it difficult to start and run properly. Inspect your air filter and clean or replace it as needed. A clean air filter is essential for optimal engine performance.
To clean a foam air filter, wash it with warm soapy water, rinse it thoroughly, and allow it to dry completely before reinstalling it. Paper air filters should be replaced rather than cleaned.
Fouled Spark Plug
A fouled spark plug can prevent the engine from starting. Remove the spark plug and inspect it. If it’s covered in carbon deposits or oil, clean it with a wire brush or replace it with a new spark plug. Ensure the spark plug gap is set to the manufacturer’s specifications.
Old or Contaminated Fuel
As mentioned earlier, old or contaminated fuel can cause starting problems. Drain the fuel tank and carburetor completely and refill with fresh gasoline. Consider adding a fuel stabilizer to the gasoline to prevent it from degrading over time.
Carburetor Issues
In some cases, the carburetor may be clogged or malfunctioning. This can be a more complex problem that may require professional attention. However, you can try cleaning the carburetor yourself using carburetor cleaner. Be sure to follow the instructions on the cleaner carefully.
Preventing Future Fuel Run-Outs
While knowing how to restart your mower is important, it’s even better to prevent it from running out of gas in the first place. Here are some tips to help you avoid this situation:
Check the Fuel Level Before Each Use
Before you start mowing, always check the fuel level in the tank. This simple step can save you a lot of hassle. If the fuel level is low, add more gas before you begin.
Estimate Fuel Consumption
Try to estimate how much fuel your mower consumes during a typical mowing session. This will help you plan your refueling accordingly. If you know that your mower typically uses half a tank of gas to mow your lawn, be sure to refill it before starting the next time.
Keep Extra Gas on Hand
Keep a can of gasoline on hand so you can easily refuel your mower when needed. Be sure to store the gasoline in a safe and appropriate container, away from heat and open flames.
Consider a Fuel Gauge
Some lawn mowers have a fuel gauge that shows you how much fuel is left in the tank. If your mower doesn’t have a fuel gauge, you might consider adding one.
Maintaining Your Mower for Optimal Performance
Regular maintenance is essential for keeping your lawn mower running smoothly and preventing starting problems. Here are some key maintenance tasks to perform regularly:
Change the Oil
Change the oil in your mower’s engine regularly, following the manufacturer’s recommendations. Old oil can become thick and sludgy, making it difficult for the engine to start and run properly.
Clean or Replace the Air Filter
As mentioned earlier, a clean air filter is essential for optimal engine performance. Clean or replace the air filter regularly, depending on its condition.
Inspect and Clean the Spark Plug
Inspect and clean the spark plug regularly, and replace it when necessary. A fouled spark plug can cause starting problems and reduce engine performance.
Sharpen or Replace the Mower Blades
Sharp mower blades are essential for a clean and efficient cut. Sharpen your mower blades regularly, and replace them when they become worn or damaged.
Store Your Mower Properly
When you’re not using your mower, store it in a dry and protected location. Before storing your mower for an extended period, drain the fuel tank and carburetor to prevent fuel from gumming up the engine.
Starting a lawn mower after it runs out of gas is a manageable task if you follow the correct procedures. Understanding the steps involved, troubleshooting potential issues, and practicing preventative maintenance can ensure your lawn-mowing tasks are completed efficiently and without unnecessary delays. By keeping your mower well-maintained and refueled, you’ll be well-equipped to handle any yard work. Remember to always prioritize safety and consult your owner’s manual for specific instructions related to your mower model.
What is the first thing I should do if my lawnmower runs out of gas?
The very first thing you need to do is allow the engine to cool down completely. Gasoline is highly flammable, and pouring more fuel into a hot engine can create a dangerous situation. Wait at least 15-20 minutes to ensure the engine block, muffler, and other components have sufficiently cooled before proceeding. This minimizes the risk of fire or burns during the refueling process.
Next, make sure you are in a well-ventilated area away from any potential ignition sources like open flames, sparks, or cigarettes. Move the lawnmower to a location outdoors where fresh air can circulate freely. This reduces the build-up of fumes and further minimizes the risk of accidental ignition or breathing in harmful vapors.
What type of gasoline should I use in my lawnmower?
Most lawnmowers require unleaded gasoline with an octane rating of 87 or higher. Check your owner’s manual for the specific recommendations for your mower’s engine. Using the correct type of fuel ensures optimal performance and helps prevent engine damage. Avoid using gasoline with ethanol content higher than 10% (E10), as it can damage small engines not designed for higher concentrations.
Furthermore, consider using fuel stabilizer, especially if the gasoline has been stored for more than 30 days. Fuel stabilizer helps prevent the gasoline from breaking down and forming gum or varnish that can clog the carburetor and fuel lines. Add the stabilizer to the fuel according to the manufacturer’s instructions before adding the gasoline to the mower’s tank.
How do I properly add gasoline to my lawnmower?
First, locate the fuel tank and carefully remove the gas cap. Using a clean funnel, slowly pour the gasoline into the tank, avoiding spills. Do not overfill the tank; leave some space for expansion. Overfilling can cause fuel to leak when the engine warms up and cause a potential fire hazard.
After filling the tank, securely replace the gas cap. Wipe up any spilled gasoline immediately with a clean cloth. Ensure the area around the mower is clear of fuel before starting it. Safe refueling practices significantly reduce the risk of accidents.
My lawnmower is hard to start after running out of gas. What could be the problem?
One common reason for difficulty starting after running out of gas is that the fuel lines and carburetor may be empty. This means you’ll need to prime the engine to draw fuel from the tank to the carburetor. Repeatedly pressing the primer bulb several times (usually 3-5 times) will help prime the engine. Avoid over-priming, which can flood the engine.
Another possibility is a dirty air filter. A clogged air filter restricts airflow to the engine, making it difficult to start, especially after a disruption like running out of fuel. Check the air filter and clean or replace it if necessary. A clean air filter ensures proper air-fuel mixture, aiding in starting.
What is the purpose of the primer bulb, and how do I use it correctly?
The primer bulb is a small rubber or plastic bulb located on the carburetor of many lawnmowers. Its purpose is to manually draw fuel from the gas tank into the carburetor, priming the engine for starting. It works by creating a vacuum that pulls fuel into the carburetor bowl.
To use it correctly, press the primer bulb firmly several times, typically 3-5 times, before attempting to start the engine. Allow a few seconds between each press to allow the fuel to be drawn into the carburetor. Avoid over-priming, which can flood the engine and make it even harder to start. Listen for a slight gurgling sound, which indicates fuel is being drawn into the carburetor.
Should I check the oil level after my lawnmower runs out of gas?
Yes, it’s always a good idea to check the oil level after your lawnmower has run out of gas, especially if the mower had been running for an extended period before it stopped. Running the engine with insufficient oil can cause significant damage. Use the dipstick to check the oil level and ensure it is within the recommended range indicated in your owner’s manual.
If the oil level is low, add the appropriate type and amount of oil as specified in your lawnmower’s manual. Running the lawnmower with low oil levels can lead to overheating and engine seizure, resulting in costly repairs. Regular oil level checks are crucial for maintaining engine health.
What should I do if my lawnmower still won’t start after following all these steps?
If your lawnmower still won’t start after refueling, priming, checking the air filter, and checking the oil level, there may be a more significant issue. A common problem is a clogged carburetor. Gasoline can leave deposits in the carburetor over time, especially if the mower sits unused for extended periods. Cleaning or rebuilding the carburetor might be necessary.
Another possible cause is a faulty spark plug. Remove the spark plug and inspect it for damage or fouling. Clean the spark plug with a wire brush or replace it with a new one if needed. A properly functioning spark plug is essential for igniting the fuel-air mixture and starting the engine. If you are not comfortable performing these repairs yourself, it is best to take the lawnmower to a qualified repair technician.