Why Your Snow Blower Won’t Start (and How to Fix it)

When winter hits hard, a snow blower can be a lifesaver. But what happens when your machine won’t start? Before you panic, there are several common reasons why your snow blower might be refusing to fire up. Here’s a comprehensive guide to help you diagnose and fix the issue.

1. Check the Fuel System

Old or Stale Fuel: If fuel has been sitting in the tank for months, it may have degraded, making it harder to ignite. Drain the old fuel and refill the tank with fresh gasoline.

Clogged Fuel Line or Carburetor: Over time, fuel can leave behind deposits that clog the fuel line or carburetor. Clean the fuel system with a carburetor cleaner or, in severe cases, consider disassembling the carburetor for a thorough cleaning.

2. Inspect the Spark Plug

A faulty spark plug is a common cause of starting issues. Remove the spark plug and check for:

• Dirt or carbon buildup (clean or replace if necessary)
• A damaged electrode (replace if worn out)
• Loose connections (tighten as needed)

If in doubt, replace the spark plug with a new one to eliminate it as a potential problem.

3. Examine the Ignition System

If your snow blower still won’t start, the ignition system could be at fault. Check the ignition key (if applicable) and ensure it is properly inserted. Also, inspect the ignition coil and kill switch for any damage or loose wires.

4. Check the Choke and Throttle Settings

• Make sure the choke is set to the correct position (usually fully closed for cold starts).
• The throttle should be set to a high or “fast” position to provide sufficient power to start the engine.

5. Battery Issues (For Electric Start Models)

If you have an electric start snow blower, check the battery. A dead or weak battery may not provide enough power to turn the engine over. Recharge or replace the battery if necessary.

6. Frozen or Gummed-Up Components

Cold temperatures can cause moisture to freeze within the engine or moving parts. If your snow blower has been stored in extreme cold, move it to a warmer location for a while and try again.

7. Faulty Safety Features

Many snow blowers have built-in safety features such as a dead man’s switch, interlock system, or auger engagement safety switch. If any of these are malfunctioning, the snow blower won’t start. Check these components and ensure they are functioning properly.

8. Compression Issues

If your snow blower has been in use for many years, low engine compression could be preventing it from starting. This is often caused by worn piston rings or valves. If you suspect compression problems, it may be time for professional repair or engine replacement.

When to Fix vs. When to Replace Your Snow Blower

Knowing when to repair your snow blower and when to replace it can save time and money. Here are some key factors to consider:

When to Fix Your Snow Blower:

• The issue is minor, such as a clogged carburetor, dirty spark plug, or stale fuel.
• The cost of repair is significantly lower than buying a new machine.
• Your snow blower is less than 10 years old and has been well-maintained.
• You can easily find replacement parts, and the repair is straightforward.

When to Replace Your Snow Blower:

• The engine or transmission has major issues that require expensive repairs.
• Your snow blower is over 10-15 years old and has recurring problems.
• The repair costs approach or exceed 50% of the price of a new model.
• Replacement parts are difficult to find or no longer available.
• You need a more powerful or efficient machine to handle heavier snowfalls.

How Much Does It Cost to Repair a Snow Blower?

The cost of repairing a snow blower varies depending on the issue, the brand, and whether you do the repairs yourself or hire a professional. Here are some common repair costs:

• Spark Plug Replacement: $5 – $20 (DIY) / $40 – $75 (Professional)
• Carburetor Cleaning or Replacement: $20 – $50 (DIY) / $75 – $150 (Professional)
• Fuel Line Replacement: $10 – $30 (DIY) / $50 – $100 (Professional)
• Auger Belt Replacement: $20 – $50 (DIY) / $75 – $125 (Professional)
• Shear Pin Replacement: $5 – $15 (DIY) / $30 – $60 (Professional)
• Electric Starter Repair: $50 – $150 (DIY) / $150 – $300 (Professional)
• Engine Overhaul or Replacement: $300 – $800 (Professional)

For minor repairs, doing the work yourself can save money. However, for more complex issues like engine or transmission problems, professional repairs may be necessary. Always compare the repair cost with the price of a new snow blower to determine the best course of action.

Final Thoughts

A snow blower that won’t start can be frustrating, especially when you’re faced with a driveway full of snow. By systematically checking the fuel system, spark plug, ignition, and other critical components, you can often identify and fix the issue yourself. If all else fails, consider consulting a professional for further diagnosis and repair.

By staying proactive with maintenance and proper storage, you can keep your snow blower in top shape and ready to tackle the winter weather whenever you need it. However, if repairs become too frequent or costly, replacing your machine may be the best long-term solution.