If you're a snowblower enthusiast, you've probably encountered the dreaded problem of stale gas causing starting issues or poor performance. Don't let old gas dampen your snow-clearing spirits! In this comprehensive guide, we'll delve into the causes, effects, and solutions for stale gas in your snowblower, ensuring you're always ready for the next snowstorm.
Understanding Stale Gas in Snowblowers
Stale gas, also known as old or bad gas, is a common issue in small engines like those found in snowblowers. Gasoline begins to deteriorate after about 30 days, especially when exposed to air and heat. This breakdown can lead to a variety of problems, including:
- Difficulty starting the engine
- Loss of power and performance
- Hardened or gummed-up carburetor
- Clogged fuel lines and injectors
Causes of Stale Gas in Snowblowers
Several factors contribute to gas going bad in your snowblower:

Age of Gasoline
Gasoline starts to degrade after about a month. If you only use your snowblower occasionally, you might be leaving it with old gas that's causing more harm than good.
Exposure to Air and Heat
When gasoline is exposed to air and heat, it oxidizes, leading to the formation of varnish and gum. These deposits can clog fuel lines and carburetors, causing starting and performance issues.
Ethanol Content
Ethanol, a common additive in gasoline, attracts water, which can lead to phase separation, creating a layer of water at the bottom of your fuel tank. This water can cause corrosion and damage to your snowblower's engine.

Preventing Stale Gas in Snowblowers
Preventing stale gas is much easier than dealing with the consequences. Here are some tips to keep your snowblower's gas fresh:
- Use fresh gasoline (less than 30 days old) each time you fill up your snowblower.
- Add a fuel stabilizer to your gas when storing your snowblower for extended periods. This can extend the shelf life of your gas up to 12 months.
- Store your snowblower in a cool, dry place to minimize the effects of heat and humidity on the gasoline.
Dealing with Stale Gas in Snowblowers
If you suspect your snowblower's gas has gone bad, don't despair. There are several steps you can take to revive your engine:
Drain and Refill
Drain the old gas from your snowblower's fuel tank and carburetor. Refill with fresh gasoline and a fuel stabilizer to prevent future issues.
Use a Fuel System Cleaner
Add a fuel system cleaner to your snowblower's gas tank and run the engine for a few minutes. This can help dissolve and remove deposits caused by stale gas.
Replace the Fuel Filter
If your snowblower has a fuel filter, replace it to ensure clean gas reaches your engine.
When to Seek Professional Help
If you've tried the above methods and your snowblower still isn't performing as it should, it might be time to consult a professional. Serious damage from stale gas, such as a clogged carburetor or fuel injectors, may require specialized tools and knowledge to repair.
Don't let stale gas hold you back from tackling the next snowstorm. With the right knowledge and preventative measures, you can keep your snowblower running smoothly and efficiently all season long.