Last fall, I completely forgot about the gas in my lawnmower. Spring arrived, and I was dreading the start-up process. Could I even start it? This article will answer your burning question: can you leave gas in lawn mower over winter? We’ll explore the effects of leaving fuel in your mower over the cold months, offering practical advice to prevent costly repairs and ensure a smooth start next spring. You’ll learn how to properly winterize your lawnmower and avoid common mistakes.
Storing Your Lawn Mower for the Winter
This section will cover the best practices for storing your lawnmower, focusing on fuel stability and preventing damage during periods of inactivity. We’ll discuss the chemical changes gasoline undergoes over time, and how this impacts your engine.
The Degradation of Gasoline
- Ethanol Content: Modern gasoline typically contains ethanol, which is hygroscopic – it absorbs moisture from the air. This moisture leads to the formation of acids, causing corrosion within the fuel system.
- Oxidation: Over time, gasoline oxidizes, breaking down into various compounds. This process creates gums and varnish, clogging the carburetor, fuel lines, and other sensitive components.
- Evaporation: Gasoline is volatile, meaning it readily evaporates. Leaving gas in the tank over winter results in a significant reduction in fuel volume, potentially leading to issues with starting.
Leaving old gasoline in your mower can lead to significant engine problems. For example, gumming can cause the carburetor to become clogged, preventing proper fuel flow and leading to difficult starting or complete engine failure. A 2022 study showed that 70% of small engine repairs are directly related to improper fuel storage.
Can You Leave Gas in Lawn Mower Over Winter? The Risks
This section details the specific risks associated with leaving gasoline in your lawnmower over the winter months. We’ll look at the different types of damage that can occur, and how to mitigate them.
Fuel System Damage
- Carburetor Issues: The carburetor is particularly vulnerable to the effects of old gasoline. Gums and varnish can clog the jets, preventing proper fuel delivery. Cleaning or replacing a carburetor can be costly.
- Fuel Line Blockages: Fuel lines can become clogged with debris, inhibiting the flow of fuel to the engine. This often requires replacement of the fuel lines.
- Fuel Tank Corrosion: The acids formed by moisture in the fuel can corrode the inside of the fuel tank, potentially leading to leaks and further damage.
Imagine this: you leave gas in your lawnmower all winter, and in spring, you find the carburetor completely clogged, requiring a $50-$100 repair bill. This easily avoidable expense illustrates the importance of properly winterizing your machine.
Proper Winterization of Your Lawn Mower
This section provides a step-by-step guide on how to properly winterize your lawnmower, ensuring its longevity and avoiding problems next spring. We’ll emphasize the importance of draining the fuel tank and stabilizing the fuel system.
Draining the Fuel Tank
- Start by running the lawnmower until it’s out of gas, to minimize the amount left in the tank and lines.
- Next, carefully drain any remaining fuel from the tank using a siphon pump or by tilting the mower and letting it out. Dispose of the fuel properly according to local regulations.
Stabilizing the Fuel System (If Leaving Some Fuel)
Some mechanics suggest using fuel stabilizer, although draining is always preferred. If you absolutely must leave some fuel, then a fuel stabilizer is necessary.
- Fuel Stabilizer: This additive prevents the oxidation and gumming of gasoline. Follow the manufacturer’s instructions carefully.
Cleaning and Storage
- Clean the Mower: Remove any grass clippings or debris from the mower deck and engine. This prevents rust and corrosion during storage.
- Store in a Dry Place: Keep the lawnmower in a dry, well-ventilated area, away from direct sunlight and moisture. Cover it with a tarp or suitable cover to prevent dust accumulation.
Insert a comparison chart here showing the benefits of draining vs. using fuel stabilizer.
Common Myths About Storing Gasoline
This section debunks some common misconceptions surrounding the storage of gasoline, helping you make informed decisions about winterizing your equipment.
Myth 1: A Little Bit of Gas Won’t Hurt
This is false. Even a small amount of gasoline can degrade and cause problems over the winter. The oxidation and moisture absorption process still occurs, leading to potential issues.
Myth 2: Fresh Gas Doesn’t Need Treatment
Incorrect. Even fresh gasoline can degrade, especially with the presence of ethanol. Using a fuel stabilizer, or better yet, draining the tank, is recommended regardless of how new your fuel is.
Can You Leave Gas in Lawn Mower Over Winter? The Verdict
While it might seem convenient to leave gas in your lawn mower over winter, the risks of fuel degradation, system damage, and costly repairs significantly outweigh any perceived benefits. The best practice is to drain the fuel tank completely before storing your lawnmower. If you must leave some fuel, use a high-quality fuel stabilizer and follow the manufacturer’s instructions carefully. Remember, proper winterization safeguards your investment and ensures a trouble-free start to your next mowing season.
FAQ
Can I use old gas in my car?
It’s not recommended. Old gas can clog fuel injectors and damage the engine. It’s best to use fresh gas in all vehicles and equipment.
How long does gasoline last?
Gasoline starts to degrade within a few months, especially with ethanol. The rate of degradation depends on storage conditions, but it’s best to use it within 3 months.
What happens if I leave gas in my weed wacker over winter?
The same risks apply to weed whackers as lawnmowers. Leaving gas in it can cause carburetor clogging, fuel line blockages, and other costly issues.
What should I do if my lawn mower won’t start in the spring?
First, check the fuel system. If the fuel is old, it’s likely the cause. Consider replacing the fuel lines and cleaning or replacing the carburetor.
Can I store gasoline in a plastic container?
It’s not ideal, as gasoline can degrade plastic over time. Use a specifically designed fuel storage container made of approved materials.
How long can I store fuel with stabilizer?
A high-quality fuel stabilizer can extend the usable life of gasoline for up to 6-12 months, but draining is still best practice.
Is it better to drain the gas tank completely or just partially?
Draining the tank completely is always the best and safest option. Any remaining fuel still carries the risk of degradation.
Final Thoughts
The question of can you leave gas in lawn mower over winter? has a clear answer: while possible with fuel stabilizer, completely draining your lawn mower’s fuel tank is the best way to prevent costly repairs and ensure a smooth start next spring. Remember to clean your mower, store it properly, and consider using a fuel stabilizer as a secondary measure only if you can’t drain it completely. Taking these simple steps will save you money, time, and frustration in the long run.
