Toro S-620 Snowblower Troubleshooting: Won't Start Issues Solved

Emily Jul 26, 2026

Are you a frustrated owner of a Toro S-620 snowblower whose machine refuses to start? You're not alone. Many snowblower owners face this issue, especially after a long winter hiatus. Let's explore common reasons behind this problem and how you can troubleshoot and resolve it.

a red lawn mower sitting on top of a parking lot next to a sprayer
a red lawn mower sitting on top of a parking lot next to a sprayer

Before you giving up and thinking about sending your Toro S-620 for repairs, consider these common reasons and solutions that might get your snowblower running again.

Snow Blower How-To Videos | Maintenance & Safety Checklists
Snow Blower How-To Videos | Maintenance & Safety Checklists

Common Reasons Why Toro S-620 Snowblower Won't Start

Understanding the possible reasons can guide you to the right troubleshooting steps. Here are four common causes:

Toro Recalls Power Max Snow Blowers - Consumer Reports
Toro Recalls Power Max Snow Blowers - Consumer Reports

1. **Fuel-Related Issues**: Old, stale, or contaminated fuel can cause starting problems. Water in the fuel tank can also prevent your Toro S-620 from starting.

2. **Clogged Fuel System**: A clogged fuel system, including fuel lines and carburetor, can stop your snowblower from starting.

a man standing next to a red snow blower in a room filled with tools
a man standing next to a red snow blower in a room filled with tools

3. **Faulty Spark Plug**: A worn-out or fouled spark plug won't produce a strong enough spark to ignite the fuel, preventing your Toro S-620 from starting.

4. **Malfunctioning Ignition Coil**: If the ignition coil is faulty, it won't send the necessary spark to the spark plug, resulting in a no-start condition.

Fuel-Related Issues: Prevention and Remedy

​The Best Snow Blowers
​The Best Snow Blowers

Always use fresh fuel and add a fuel stabilizer if your snowblower is going to sit for an extended period. If you suspect fuel-related issues, try draining the gas tank and filling it with fresh fuel.

If water has entered the fuel system, you might need to use a fuel system cleaner and regulator to remove it. Always ensure that the gas cap is on tight to prevent water and debris from entering the tank.

Clogged Fuel System: Cleaning and Maintenance

Toro 7/24 snow blower starts and quits
Toro 7/24 snow blower starts and quits

A clogged fuel system can be cleaned using a carburetor cleaner and a few simple tools. Remove the carburetor, spray the cleaner into the jets, and reassemble. Regularly check and clean your fuel system to prevent future clogs.

If the carburetor is severely clogged, consider replacing it with a new one. Ensure you're using the right carburetor for your Toro S-620 model as it varies across different snowblowers.

Toro's stand-on mower is capable of plowing snow as well
Toro's stand-on mower is capable of plowing snow as well
a snow plow is parked in the snow
a snow plow is parked in the snow
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How To: Change Your Toro Snowblower Engine Oil (Two Stage and SnowMax)
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Toro Vs Ariens Snowblower Difference
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Toro Vs. Ariens Snowblower - Which Is Best?
a man is using a snow blower to clear the driveway
a man is using a snow blower to clear the driveway
TORO Snowblower 928 OHXE Power Max HD First Look
TORO Snowblower 928 OHXE Power Max HD First Look
a large yellow construction vehicle parked in a parking lot next to other trucks and trees
a large yellow construction vehicle parked in a parking lot next to other trucks and trees
Vintage Snow Blower (02) Historic Winter Machinery, Black And White Vintage Vehicle, Historical Vehicle Collection Ideas, Restoring Vintage Trucks, Vintage Snow Plow Truck, Vintage Tractor With Snow Plow, Antique Tractor Snow-covered, Snow-covered Vintage Tractor, Antique Road Construction Equipment
Vintage Snow Blower (02) Historic Winter Machinery, Black And White Vintage Vehicle, Historical Vehicle Collection Ideas, Restoring Vintage Trucks, Vintage Snow Plow Truck, Vintage Tractor With Snow Plow, Antique Tractor Snow-covered, Snow-covered Vintage Tractor, Antique Road Construction Equipment
The Best Snow Blowers for All Winter Weather
The Best Snow Blowers for All Winter Weather

Snowblower Maintenance to Avoid Future Starts Problems

Preventative maintenance is crucial to avoid future starting problems. Here are some tips to keep your Toro S-620 in optimal working condition:

1. **Regular Oil Changes**: Change the oil in your snowblower according to the manufacturer's suggestions. This helps keep the engine lubricated and running smoothly.

2. **Inspect Spark Plugs**: Inspect spark plugs regularly and replace them annually, or whenever you notice a decline in performance.

3. **Clean Air Filter**: A clean air filter allows your Toro S-620's engine to breathe properly. Inspect and clean or replace your air filter regularly.

Safety Tips When Working on Your Toro S-620

Always disconnect the spark plug wire before performing any maintenance on your snowblower to prevent accidental starts. Allow the engine to cool down before working on it to avoid burns.

Wear appropriate safety gear, including gloves and safety glasses, when working on your snowblower. Keep your work area well-lit and clean to prevent accidents.

Remember, if you're unsure about any maintenance or repair task, consult a professional to avoid causing further damage to your Toro S-620.

Don't let a non-starting Toro S-620 deter you from tackling snowstorms. By understanding and addressing common causes, you can get your snowblower running again in no time. Happy snowblowing!