Water in your lawn mower’s gas tank is a common problem, but it can cause significant engine troubles. Water doesn’t burn like gasoline, and it can prevent your mower from starting, cause it to run poorly, or even damage the engine. This comprehensive guide will walk you through the steps of identifying the problem and effectively removing the water, so you can get back to maintaining your lawn.
Understanding the Problem: Why Water Gets into Your Gas Tank
Water contamination in a lawn mower’s fuel system can happen for several reasons. Understanding these causes can help you prevent future issues.
Condensation: The Silent Culprit
Condensation is a frequent cause. Temperature fluctuations can cause water vapor to condense inside the gas tank, especially in humid environments. This is more prevalent when the gas tank is not full, leaving more room for air and moisture to accumulate.
Contaminated Fuel: Unseen Threat
Sometimes, the gasoline itself is the source. If gasoline is stored improperly or purchased from a station with compromised storage tanks, it might already contain water. Always purchase fuel from reputable sources.
Rain and Wash Water: Accidental Entry
Rainwater can seep into the gas tank if the cap is loose or missing. Washing your lawn mower with a hose can also force water into the tank through openings around the fuel cap or other connections.
Improper Storage: A Recipe for Disaster
Storing your lawn mower outside without proper covering exposes it to the elements. Over time, this can lead to water infiltration into the fuel system.
Identifying Water in Your Lawn Mower’s Gas Tank
Recognizing the signs of water contamination early can save you time and effort in the long run.
Difficulty Starting: The First Sign
One of the most common symptoms is difficulty starting the engine. Water prevents the gasoline from igniting properly, making it hard to get the engine running. Persistent attempts to start the mower might flood the engine, compounding the problem.
Rough Running Engine: A Clear Indicator
If the mower does start, it might run roughly, sputter, or stall frequently. This is because the water interferes with the combustion process, causing an inconsistent fuel supply to the engine.
Visible Water in the Gas Tank: Obvious Confirmation
In some cases, you can visually inspect the gas tank and see water droplets or a separate layer of water at the bottom. Since water is denser than gasoline, it will settle at the bottom of the tank. This is a sure sign of contamination.
Rust and Corrosion: Long-Term Damage
Over time, water can cause rust and corrosion within the fuel system. This can lead to further problems, such as clogged fuel lines and carburetor issues. Check for rust around the fuel cap and inside the tank.
Tools and Materials You’ll Need
Before you start the process of removing water, gather all the necessary tools and materials. Having everything on hand will make the job smoother and more efficient.
- Fuel Stabilizer: To prevent future water accumulation and fuel degradation.
- Fresh Gasoline: To replace the contaminated fuel.
- Gas Can: For storing the old fuel and the new gasoline.
- Siphon Pump or Turkey Baster: For removing fuel from the tank.
- Clean Rags: For wiping up spills and cleaning parts.
- Wrench Set: For loosening and tightening fuel lines and drain plugs.
- Screwdrivers: Both flathead and Phillips head may be needed.
- Fuel Line Clamp (Optional): To prevent fuel leakage when disconnecting lines.
- Gloves: To protect your hands from gasoline.
- Safety Glasses: To protect your eyes.
- Small Funnel: For pouring gasoline without spills.
Step-by-Step Guide to Removing Water from the Gas Tank
Follow these steps carefully to ensure you remove all the water and prevent further issues.
Step 1: Safety First
Before starting any work on your lawn mower, prioritize safety. Disconnect the spark plug wire to prevent accidental starting. Work in a well-ventilated area to avoid inhaling gasoline fumes. Wear gloves and safety glasses. Never smoke or work near open flames.
Step 2: Drain the Gas Tank
The first step is to remove all the contaminated fuel from the gas tank. There are a few ways to do this:
- Siphon Method: Insert a siphon pump hose into the gas tank and pump the fuel into a gas can. Make sure the hose reaches the bottom of the tank to remove the water that has settled there.
- Drain Plug Method: Some lawn mowers have a drain plug at the bottom of the gas tank. Place a container under the plug and carefully loosen it with a wrench to drain the fuel. Be prepared for a quick flow of gasoline.
- Tilting Method: If neither of the above options is available, you can carefully tilt the lawn mower to pour the fuel out of the tank. This method requires extra caution to avoid spilling fuel on the engine or surrounding area.
Step 3: Inspect the Fuel
After draining the tank, examine the fuel you removed. Look for signs of water contamination, such as water droplets or a separate layer of water at the bottom of the container. This confirmation will help you gauge the severity of the problem.
Step 4: Clean the Gas Tank (If Necessary)
If there’s a significant amount of water or debris in the tank, it’s a good idea to clean it thoroughly.
- Rinse with Fresh Gasoline: Pour a small amount of fresh gasoline into the tank and swirl it around to loosen any remaining contaminants. Then, pour the gasoline out into a waste container.
- Dry the Tank: Allow the tank to air dry completely, or use a clean rag to wipe it dry. Ensure no lint is left behind.
Step 5: Check and Clean the Fuel Line
The fuel line connects the gas tank to the carburetor. Water can accumulate in the fuel line, so it’s essential to inspect and clean it.
- Disconnect the Fuel Line: Use a fuel line clamp (if available) to pinch off the fuel line. Carefully disconnect the fuel line from both the gas tank and the carburetor.
- Inspect for Blockages: Check the fuel line for any blockages or kinks. Blow through the fuel line to ensure it is clear.
- Clean the Fuel Line: If there are any obstructions, use compressed air or a small wire to clear them. You can also rinse the fuel line with fresh gasoline.
Step 6: Clean the Carburetor (Crucial for Optimal Performance)
The carburetor is responsible for mixing fuel and air for combustion. Water in the gas tank can affect the carburetor’s performance.
- Locate the Carburetor: The carburetor is usually located near the engine, connected to the air filter and fuel line.
- Check and Clean the Carburetor Bowl: Most carburetors have a bowl at the bottom that collects fuel. Remove the bowl and check for water or sediment. Clean the bowl thoroughly with carburetor cleaner.
- Clean the Carburetor Jets: The carburetor jets are small openings that control the fuel flow. These jets can become clogged with debris. Use a carburetor cleaning tool or a thin wire to clean the jets. Be extremely careful not to enlarge the jets.
- Reassemble the Carburetor: Once you have cleaned the carburetor, reassemble all the parts carefully.
Step 7: Replace the Fuel Filter (If Applicable)
Many lawn mowers have a fuel filter located in the fuel line. If your mower has a fuel filter, replace it with a new one to ensure a clean fuel supply to the engine.
Step 8: Add Fresh Gasoline and Fuel Stabilizer
Now that you have cleaned the fuel system, it’s time to add fresh gasoline.
- Use Fresh Gasoline: Fill the gas tank with fresh, high-quality gasoline. Avoid using old gasoline that has been sitting for a long time.
- Add Fuel Stabilizer: Add a fuel stabilizer to the gasoline to prevent future water accumulation and fuel degradation. Follow the manufacturer’s instructions for the correct amount of stabilizer to use.
Step 9: Reconnect Everything and Start the Engine
Reconnect the fuel line to the gas tank and carburetor, making sure the connections are secure. Reconnect the spark plug wire. Attempt to start the engine. It may take a few tries for the engine to start, as the fuel system needs to prime.
Step 10: Monitor Engine Performance
Once the engine starts, let it run for a few minutes and monitor its performance. Listen for any unusual noises or signs of rough running. If the engine runs smoothly, you have successfully removed the water from the gas tank. If it continues to run poorly, further diagnosis might be required, such as checking the spark plug or air filter.
Preventing Water Accumulation in the Future
Taking preventative measures can save you time and hassle in the long run.
Store Fuel Properly: A Key Strategy
Store gasoline in a sealed, airtight container in a cool, dry place. Avoid storing gasoline in direct sunlight or in areas with extreme temperature fluctuations. Use a fuel stabilizer, especially if you’re not going to use the gasoline for a long time.
Keep the Gas Tank Full: Minimize Condensation
Keeping the gas tank full reduces the amount of air inside, minimizing the potential for condensation. If you know you won’t be using the mower for a while, fill the tank to the top before storing it.
Use a Fuel Stabilizer Regularly: Preventative Maintenance
Adding a fuel stabilizer to your gasoline every time you fill up the tank can help prevent water accumulation and fuel degradation.
Cover Your Lawn Mower: Protect from the Elements
When storing your lawn mower, cover it with a waterproof cover to protect it from rain and moisture. This will help prevent water from seeping into the gas tank or other parts of the engine.
Regular Maintenance: Catch Problems Early
Perform regular maintenance on your lawn mower, including checking the fuel system for any signs of leaks or corrosion. This will help you catch problems early before they become major issues.
By following these steps, you can effectively remove water from your lawn mower’s gas tank and prevent future problems. Remember, safety is always the priority. With a little patience and effort, you can keep your lawn mower running smoothly for years to come.
Why is water in my lawn mower gas tank a problem?
Water contamination in your lawn mower’s gas tank is detrimental because gasoline and water don’t mix. The water, being heavier, settles at the bottom of the tank and can be drawn into the fuel lines and carburetor. This prevents the engine from receiving a consistent supply of gasoline, leading to poor performance, sputtering, difficulty starting, or even complete engine failure.
Furthermore, water can cause corrosion within the fuel system, particularly in the carburetor and fuel lines. Rust and oxidation can clog these components, further hindering the engine’s ability to run smoothly. This corrosion can eventually lead to costly repairs or the need to replace entire parts of the fuel system, emphasizing the importance of removing water promptly.
How can I tell if there’s water in my lawn mower gas tank?
Several symptoms can indicate water contamination. One common sign is difficulty starting the engine, especially after the mower has been sitting unused for a while. You might also experience the engine sputtering or running roughly, exhibiting inconsistent power output. In severe cases, the engine may start and then immediately stall, refusing to run at all.
Another telltale sign is the presence of a milky or cloudy appearance in the gasoline if you drain a small sample into a clear container. If you allow this sample to settle, you might observe a distinct separation, with a layer of water at the bottom and the gasoline on top. This clear visual indication confirms water contamination and necessitates immediate action.
What tools and materials will I need to remove water from my lawn mower gas tank?
To effectively remove water, you will need a few basic tools and materials. A siphon pump or turkey baster is crucial for extracting the contaminated fuel from the tank. You’ll also need a container to safely collect the used gasoline and water mixture. It’s important that this container is fuel-resistant and properly sealed for safe disposal.
Additionally, have some clean, fresh gasoline on hand to refill the tank after removing the contaminated fuel. Consider using a fuel stabilizer to prevent future water accumulation. Finally, a few rags or shop towels will be useful for cleaning up any spills and ensuring a tidy workspace during the process. Safety glasses and gloves are recommended for protection from fuel exposure.
What’s the best method for removing water from the gas tank?
The most effective method involves siphoning or pumping out all the fuel from the tank using a siphon pump or turkey baster. Insert the hose into the tank, reaching as close to the bottom as possible to ensure you remove the water that has settled there. Carefully extract all the fuel mixture into a suitable container for disposal.
After emptying the tank, consider adding a small amount of fresh gasoline and sloshing it around to rinse any remaining water or sediment from the interior. Then, pump out this rinse fuel as well. Finally, refill the tank with fresh, clean gasoline. Adding a fuel stabilizer is a proactive step to prevent future water accumulation and maintain fuel quality.
How do I dispose of the contaminated gasoline and water mixture properly?
Proper disposal is crucial for environmental safety. Never pour contaminated gasoline down drains, onto the ground, or into sewers. Contact your local waste management facility or environmental protection agency to inquire about designated collection points for hazardous waste. Many communities have programs specifically designed for the safe disposal of gasoline, oil, and other flammable liquids.
Alternatively, some auto parts stores and repair shops may accept used gasoline for recycling or proper disposal. Inquire about their policies and procedures before dropping off the contaminated fuel. Storing the fuel in a sealed, clearly labeled container is essential until you can arrange for its proper disposal, preventing accidental spills or misuse.
How can I prevent water from getting into my lawn mower gas tank in the first place?
Preventing water from entering your gas tank is simpler than removing it. The most important step is to store your gasoline in a tightly sealed container, preferably one designed specifically for fuel storage. This prevents moisture from the air from condensing inside and contaminating the fuel.
Additionally, always use fresh gasoline, ideally purchased within the last few months. Gasoline can absorb moisture over time, particularly if stored in a partially filled container. Adding a fuel stabilizer to the gasoline can also help prevent water absorption and maintain fuel quality during storage. Avoid leaving your lawn mower exposed to rain or humid conditions, as moisture can seep into the tank through the fuel cap or vent.
What if I still have trouble after removing the water from the gas tank?
If your lawn mower continues to exhibit starting or running problems after removing water from the gas tank, there might be further issues within the fuel system. The carburetor jets could be clogged with debris or rust, preventing proper fuel flow. In this case, cleaning or rebuilding the carburetor might be necessary.
Another possibility is that water has damaged other components, such as the fuel lines or fuel filter. Inspect these components for corrosion or blockages and replace them if needed. If you’re uncomfortable performing these repairs yourself, it’s best to consult a qualified lawn mower mechanic for professional diagnosis and repair.