Snowblower won’t start – 4 easy DIY fixes

1. Fix a Snowblower That Won’t Start by Replacing Old Gas

Bad gasoline is a leading cause of snowblower starting problems. The engine may start with stale fuel in warm weather, but cold conditions demand fresh gas. In a well-ventilated area, drain old fuel and refill with fresh gas. This simple fix often gets the engine running.

2. Check and Replace the Fuel Filter

A clogged fuel filter prevents gas from reaching the carburetor. To check if a fuel issue is causing the problem:

1. Pull off the spark plug wire and remove the spark plug.

2. Spray a short burst of starter fluid into the cylinder through the spark plug hole.

3. Reinstall the spark plug and spark plug wire.

4. Try starting the engine.

If the engine runs briefly before shutting off, fuel supply is likely the issue. Replacing the fuel filter may restore proper flow. If the issue persists, rebuilding or replacing the carburetor may be necessary. Some snowblowers require removing a shroud to access the carburetor. Follow the steps in our How to rebuild a snowblower carburetor repair guide/video to complete the repair.

3. Inspect and Replace the Fuel Line

A cracked fuel line allows air to enter, preventing the carburetor from drawing fuel. Most fuel lines are easily accessible. In a well-ventilated area, check for cracks and replace if necessary. Our Replacing a Fuel Line on a Snowblower video provides step-by-step guidance.

4. Spark Plug Issues: Why Your Snowblower Won’t Start

A fouled or damaged spark plug prevents ignition. If you removed the spark plug earlier, inspect it for wear or residue. Replace if needed. If the electrode is intact, check the spark plug gap. Many snowblower engines require a 0.020-inch to 0.030-inch gap. Consult your owner’s manual for exact specifications. Our How to check and replace a snowblower spark plug article (with video) provides more details.

If these fixes don’t work, schedule service by a Sears Technician. A professional can diagnose and repair complex issues.

Frequently Asked Questions About Snowblower Starting Problems

Can I Use Starter Fluid in My Snowblower Engine?

Check the owner’s manual for specific recommendations. Occasional use is generally safe, but excessive use can cause engine wear.

Why Does My Snowblower Engine Run for a Few Seconds Then Stop?

A gummed-up carburetor prevents the proper fuel-air mixture. The engine runs briefly because fuel enters when primed but stops when the carburetor fails to supply a steady flow. Replacing a clogged carburetor is the fastest solution. Finding the right part can be challenging. Use the carburetor part chart in our Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter article to make sure the correct fit. To save money, rebuild the carburetor instead of replacing it.

How Do I Fix a Seized Snowblower Engine?

Start with simple checks. Make sure the auger drive is disengaged so the engine pulley spins freely. Remove the spark plug and try turning the engine. If it moves freely without the spark plug, fluid may have blocked the cylinder. Reinstall the plug and start the engine. Expect smoke as the residue burns off.

If the engine remains seized:

1. Remove the spark plug.

2. Drain engine oil and gas in a well-ventilated area.

3. Add penetrating oil into the spark plug hole.

4. Tilt the snowblower to distribute oil inside the cylinder.

5. Let it sit for 24 hours.

6. Try rotating the flywheel.

If the piston frees up, refill with oil and gas, then start the engine. Heavy smoke is expected as the oil burns off. If the engine remains stuck, schedule professional service.

Schedule Maintenance to Prevent Starting Problems

Regular maintenance prevents breakdowns. Schedule annual service from Sears Home Services to keep your snowblower in top shape. A Sears technician will:

- Inspect the ignition system, carburetor, throttle, and choke controls.

- Clean engine cooling fins.

- Change engine oil.

- Check the recoil starter or electric starter.

- Lubricate moving parts and adjust drive belts or chains.

- Test equipment operation and safety features.

Annual maintenance makes sure your snowblower runs reliably all winter.