Your snowblower won’t start because of old gas, a clogged carburetor, or a bad spark plug. Figuring out why your snowblower won’t start is the first step to getting it running again before the next storm hits.
It’s a frustrating feeling. You pull the cord and nothing happens. The machine just sits there silent.
I’ve been there many times myself. The good news is that most fixes are simple and cheap.
This guide will walk you through the common reasons. We’ll get your machine blowing snow again.
Why Your Snowblower Won’t Start: The Main Culprits
Let’s break down the big three reasons. These cause most no-start problems.
Old gas is the number one villain. Gas goes bad after about 30 days in the tank.
When gas gets old, it turns into a sticky gel. This gel clogs up the tiny parts inside the carburetor.
A clogged carburetor means no fuel gets to the engine. That’s a sure way your snowblower won’t start.
A bad spark plug is another common issue. The plug creates the spark to ignite the fuel.
If the spark plug is dirty or broken, you get no spark. No spark means no boom inside the engine.
Check The Fuel System First
Always start your search here. The fuel system is the most likely problem area.
First, check if there’s gas in the tank. It sounds silly, but I’ve done it. An empty tank is an easy fix.
Next, smell the gas cap. Does the gas smell sour or like varnish? That’s a sign of old, bad fuel.
Bad fuel is why your snowblower won’t start after summer. You need to drain all the old gas out.
Use a siphon pump to pull the gas from the tank. Dump it into a proper gas can for disposal.
Then, fill the tank with fresh, clean gasoline. Add a fuel stabilizer if you plan to store it.
This simple step fixes many issues. It’s the first thing I try when my snowblower won’t start.
Inspecting The Spark Plug
A spark plug check is quick and easy. You’ll need a spark plug socket wrench.
First, find the spark plug wire. It’s a thick rubber boot on the side of the engine.
Pull the boot off gently. Now you can see the spark plug itself.
Use your wrench to unscrew the plug. Turn it counter-clockwise to loosen it.
Look at the tip of the plug. Is it covered in black soot or oil? That’s a bad sign.
The electrode (the little metal hook) should be clean. The gap should be consistent.
If the plug looks dirty or the tip is worn down, replace it. New plugs are very cheap.
A fresh spark plug often solves the mystery of why your snowblower won’t start. It’s a great five-minute fix.
The Carburetor: A Common Trouble Spot
The carburetor mixes air and fuel for the engine. It has very small jets and passages.
Old gas leaves behind a sticky residue. This residue blocks those tiny jets.
When the jets are blocked, fuel can’t flow. This is a top reason your snowblower won’t start.
You can try cleaning the carburetor with a spray cleaner. You can buy this at any auto parts store.
First, remove the air filter cover and the filter. You’ll see the carburetor underneath.
Spray the cleaner into the carburetor’s throat. Do this while pulling the starter cord a few times.
This can break up light gunk. For heavy clogs, you might need to take the carburetor apart.
Taking it apart is more work. Sometimes, buying a new, cheap carburetor is easier.
Don’t Forget The Air Filter
A dirty air filter can choke your engine. The engine needs air to run, just like it needs fuel.
Locate the air filter box. It’s usually a plastic box on the side of the engine.
Open the box and pull out the filter. Is it caked with dirt and dust?
You can try tapping it gently to clean it. For a foam filter, you can wash it with soap and water.
Let a foam filter dry completely before putting it back. A wet filter will cause more problems.
Paper filters can’t be cleaned. You must replace a dirty paper filter with a new one.
A clean air filter lets your engine breathe. This simple check can be why your snowblower won’t start.
Checking The Oil Level
Some snowblowers have a safety switch. This switch stops the engine if the oil is too low.
It’s a good feature. It protects your engine from running dry and getting wrecked.
Find the oil dipstick. It often has a bright yellow or orange handle.
Pull the dipstick out and wipe it clean. Put it back in fully, then pull it out again.
Look at the oil level on the stick. Is it between the “Low” and “Full” marks?
If the oil is below the “Low” mark, you need to add more. Use the oil type recommended in your manual.
Don’t overfill it. Too much oil can be just as bad as too little.
After topping up the oil, try starting again. A low oil level might be why your snowblower won’t start.
What To Do With The Choke
The choke helps start a cold engine. It changes the air-fuel mix to make it richer.
Most machines need the choke in the “On” or “Full” position for a cold start.
Look for the choke lever. It’s usually near the engine controls.
Move the lever to the choke position. Now try pulling the starter cord.
If the engine sputters but doesn’t run, try moving the choke to half. Then try starting again.
Once the engine is running and warm, move the choke to “Off.” Running with the choke on will flood the engine.
Using the choke wrong is a common mistake. It could be the simple reason your snowblower won’t start.
When The Pull Cord Feels Stuck
Sometimes the problem isn’t the engine. The starter mechanism itself can fail.
If the pull cord is hard to pull or stuck, don’t force it. You could break the cord or hurt yourself.
The engine might be hydro-locked. This means fluid (like oil or gas) is in the cylinder.
To check, remove the spark plug. Then try pulling the cord slowly.
If fluid sprays out the spark plug hole, that was the problem. Let everything dry out.
Also, check the recoil starter assembly. The spring inside might be broken or jammed.
You can buy a repair kit for the recoil starter. It’s a bit fiddly but doable.
A stuck cord is a different issue than an engine that won’t fire. But it still means your snowblower won’t start.
Preventative Care For Next Season
Stop the problem before it happens. A little care saves a lot of headache.
At the end of the season, run the engine dry of fuel. Or, add a fuel stabilizer to a full tank.
Stabilizer keeps the gas fresh for months. The EPA recommends proper fuel storage to reduce waste.
Change the oil at the end of the season. Dirty oil has acids that can damage engine parts over the summer.
Remove the spark plug and add a teaspoon of oil into the cylinder. Pull the cord slowly to coat the inside.
Store your snowblower in a dry place. Cover it with a breathable cover to keep dust off.
Doing these steps takes an hour. It almost guarantees you won’t ask why your snowblower won’t start next winter.
Frequently Asked Questions
Why won’t my snowblower start after sitting all summer?
Bad gas is almost always the cause. Gas breaks down and gums up the carburetor. You need to drain the old gas and put in fresh fuel.
Why won’t my snowblower start even with new gas and a new plug?
The carburetor is likely still clogged with old gunk from the bad gas. You may need to clean or replace the carburetor to get fuel flowing again.
My snowblower starts but then dies right away. Why?
This often points to a clogged carburetor jet. It lets enough fuel in to start but not enough to keep running. A good cleaning should fix it.
Why won’t my electric start snowblower start?
Check the battery first. A dead or weak battery won’t turn the engine over. Also, check all wiring connections for corrosion or looseness.
I see smoke but it won’t start. What’s wrong?
You might be flooding the engine with too much fuel. Turn the fuel valve off and pull the cord many times with the choke off. Then try starting normally.
Why won’t my snowblower start in the cold?
Use the choke fully for a cold start. Also, thinner oil rated for winter helps. The U.S. Department of Energy notes that engine performance changes in low temps.
Conclusion
So, why won’t my snowblower start? Now you know the main reasons. Old gas, a dirty spark plug, and a clogged carburetor are the usual suspects.
Start with the simple checks. Look at the gas, the spark plug, and the air filter. These fixes are fast and cheap.
With this guide, you can solve most problems yourself. You’ll save money and time. Get back to clearing your driveway fast.
