30 to 60 days – gas lasts in a snow blower this long before it starts to go bad. The exact time depends on the type of fuel you use and how you store your machine.
Old gas is a big problem for small engines. It turns into a sticky mess that clogs up the carburetor. This is why your snow blower won’t start when you need it most.
I’ve fixed many snow blowers that sat all summer. The issue is almost always bad fuel left in the tank. It’s a simple problem with a simple fix if you know what to do.
This guide will show you how to keep your gas fresh. We’ll talk about storage tips and how to avoid the no-start headache.
How Long Does Gas Last in a Snow Blower?
Let’s get straight to the point. How long does gas last in a snow blower? Regular pump gas starts to break down in about a month.
After 30 days, the lighter parts of the fuel evaporate. What’s left behind is a thicker, gummy substance. This gunk is what clogs your fuel lines and carburetor jets.
Ethanol-blended fuel is the worst for this. It attracts water from the air like a sponge. This water then separates and sits in the bottom of your tank.
That water causes rust inside your fuel system. It also makes the ethanol separate from the gasoline. This creates two layers that don’t burn well in your engine.
So, how long does gas last in a snow blower with ethanol? Maybe just 30 days before trouble starts. Non-ethanol fuel can last a bit longer, maybe two months.
The U.S. Department of Energy talks about ethanol fuel issues. They note it can cause problems in equipment that sits.
Why Old Gas is a Problem
Old gas doesn’t just vanish. It turns into something that harms your engine. Think of it like leaving soda out to get sticky.
The varnish and gum from old fuel coat the inside of your carburetor. These tiny passages are smaller than a pinhead. Even a little gunk can block them completely.
When your carburetor is clogged, fuel can’t reach the engine. Your snow blower might cough once but won’t run. Or it might start and then die as soon as you give it gas.
Water in the fuel is another silent killer. It causes corrosion on metal parts inside the fuel system. This rust then flakes off and travels into the carburetor.
Fixing a clogged carburetor is a pain. You often have to take the whole thing apart and clean every little hole. It’s much easier to just use fresh gas from the start.
I tell my friends to treat their snow blower like a lawn mower. You wouldn’t put last year’s gas in your mower, right? The same rule applies here.
Using Fuel Stabilizer
A fuel stabilizer is your best friend for storage. It’s a liquid you mix with your gas before you put it in the tank. This stuff slows down the chemical breakdown process.
Think of it like a preservative for your gasoline. It keeps the lighter parts from evaporating too fast. It also fights the effects of ethanol by bonding with the water.
You need to add stabilizer to FRESH gas. Don’t wait until the fuel is already old. Mix it in when you fill up your gas can at the station.
Shake the gas can well after adding the stabilizer. This makes sure it mixes completely with the fuel. Then fill your snow blower’s tank with this treated gas.
Run the engine for a few minutes after adding the treated fuel. This gets the stabilized gas into the carburetor and fuel lines. Now your whole system is protected.
With a good stabilizer, how long does gas last in a snow blower? You can stretch it to 6-12 months. That gets you through the off-season safely.
The Right Way to Store Your Snow Blower
End-of-season storage is key to engine health. Doing it wrong means a frustrating day next winter. Doing it right means a quick, easy start.
First, decide if you’ll store it with or without gas. I prefer to store mine with a FULL tank of stabilized fuel. An empty tank can rust from the inside out.
Fill the tank to the top with treated gas. This leaves less room for air and moisture to collect. Moisture is what causes most of the fuel problems.
Run the engine for five minutes to circulate the stabilized fuel. Then turn off the fuel valve if your machine has one. Let the engine run until it uses up the gas in the carburetor.
This last step is important. It leaves the carburetor bowl empty of liquid fuel. Any fuel left there would just turn to varnish over the summer.
Store your snow blower in a dry place. A damp shed or garage floor invites moisture problems. Put it on a piece of wood if the floor is concrete.
According to EPA guidelines, proper equipment storage cuts down on emissions. A well-tuned machine burns cleaner and wastes less fuel.
What About Non-Ethanol Fuel?
Non-ethanol gas, often called “rec fuel” or “marine fuel,” is a great choice. It doesn’t have the ethanol that attracts water. This means it stays fresh much longer.
How long does gas last in a snow blower with non-ethanol fuel? Easily 3-6 months without a stabilizer. With a stabilizer, it might last over a year.
The problem is finding it. Not all gas stations sell non-ethanol gasoline. You might need to look at marinas, small airports, or some hardware stores.
It also costs more than regular pump gas. You pay a premium for the purity. For a small snow blower tank, the extra cost is worth it to me.
I use non-ethanol fuel in all my seasonal equipment. My lawn mower, leaf blower, and snow blower all get the good stuff. The peace of mind is worth the few extra dollars.
If you can’t find non-ethanol fuel, use a stabilizer. It’s the next best thing for keeping your fuel system clean. Just remember to add it to fresh gas only.
Steps for Spring Start-Up
Let’s say you stored your snow blower properly last spring. Winter is coming and you need to get it ready. What’s the first thing you should check?
Look at the gas in the tank. If it’s old, you need to drain it all out. Don’t even try to start the engine with questionable fuel.
Use a hand pump or siphon to remove the old gas. Get as much out as you can. Then add a gallon of fresh, stabilized fuel to the tank.
Prime the engine a few times if it has a primer bulb. Pull the starter cord slowly a couple of times. This helps draw the new fuel into the carburetor.
Now try to start it. It might take a few more pulls than usual. The fresh gas needs to flush out any leftover gunk in the lines.
If it still won’t start, you might need to clean the carburetor. This isn’t too hard with basic tools. There are many good videos online that show the process.
The Consumer Reports site has tips for small engine care. They stress using fresh fuel for reliable starts every time.
Common Mistakes People Make
The biggest mistake is just forgetting about the gas. People use their snow blower, then push it into the corner of the garage. They don’t think about it again for nine months.
That gas sits and turns into a problem. Next winter, they’re out in the cold with a machine that won’t start. I’ve been there, and it’s not fun.
Another mistake is using fuel from a can that’s been open all summer. Gas in a vented container goes bad even faster. Always use fuel from a sealed, fresh container.
Some people try to mix old gas with new gas to use it up. This is a bad idea. The old gas contaminates the new gas and makes it go bad faster.
Dispose of old gas properly at a hazardous waste site. Don’t pour it on the ground or down a drain. Your local auto parts store might take it too.
How long does gas last in a snow blower if you make these mistakes? Not long at all. You’ll be dealing with starting issues every season.
Tips for Easy Winter Starts
Want your snow blower to start on the first or second pull? It’s all about preparation. Do these simple things and you’ll save yourself a lot of hassle.
Always use a fuel stabilizer, no matter what. It’s cheap insurance against carburetor problems. A small bottle treats many gallons of gas.
Buy gas in small quantities. A five-gallon can might be cheaper per gallon, but the fuel will go bad before you use it all. I buy two gallons at a time for my snow blower.
Write the date on your gas can with a marker. This way you know exactly how old the fuel is. Don’t use gas that’s more than two months old.
Run your snow blower dry at the end of the season. Or use the fuel shut-off valve to let the carburetor run dry. An empty carburetor bowl can’t get gummed up.
Check the spark plug and oil at the start of each season. A weak spark or dirty oil makes starting harder. Fresh oil and a new plug cost very little.
Following these tips answers the question of how long does gas last in a snow blower. With good habits, your fuel will last until you need it.
Safety Precautions with Fuel
Gasoline is flammable and needs careful handling. Always work in a well-ventilated area, like an open garage door. Never siphon gas by mouth – use a proper pump.
Store gas cans away from your house if you can. A detached shed is a good spot. Keep them out of direct sunlight and away from heat sources.
Use approved containers for gasoline storage. Don’t use milk jugs or other food containers. They can degrade and leak, creating a fire hazard.
When draining old gas from your snow blower, have a drip pan ready. Wipe up any spills right away. Gasoline can damage concrete and is slippery.
Dispose of old gas and oily rags properly. Oily rags can spontaneously combust if piled up. Let them dry outside, then throw them away.
The Occupational Safety and Health Administration has guidelines for flammable liquids. Safe storage prevents accidents in your home and garage.
Frequently Asked Questions
How long does gas last in a snow blower with stabilizer?
With a good stabilizer, gas can last 6 to 12 months. This is long enough to get through the off-season. Always add stabilizer to fresh gas, not old gas.
Can I use old gas if I mix it with new gas?
No, this is a bad idea. Old gas contaminates new gas and makes it go bad faster. Always use completely fresh fuel in your snow blower for the best results.
How long does gas last in a snow blower tank over summer?
Untreated gas will likely cause problems after 2-3 months of summer storage. The heat makes it break down even faster. Always use a stabilizer or drain the tank.
