Ethanol Fuel and Small Engines
A quick guide to why fuel choice matters for blowers, weed wackers, and small engines in spring.
Cheap gas often means more ethanol, and that can be rough on small engines. When equipment sits all winter, old fuel can go stale and make spring startup problems more likely.
Common fuel ratings
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E0: Ethanol-free gas. This is usually the best choice for small engines when it is available.
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E10: Up to 10% ethanol. This is the most common pump gas and is generally acceptable for many small engines.
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E15: Up to 15% ethanol. This is not recommended for small engines.
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E85: High-ethanol fuel for flex-fuel vehicles, not small engines.
Why problems show up in the spring
After sitting all winter, fuel can break down, absorb moisture, and leave deposits behind. That can lead to hard starts, rough running, or clogged fuel systems when you try to use the equipment for the first time in spring.
Simple rule
For blowers, weed wackers, push mowers, and other small engines, use E0 if you can get it, or stick with fresh E10 and avoid anything higher. If the engine sat all winter and won’t start, the fuel is one of the first things to check.
Winter storage
Want to avoid the same issue next spring? Learn more about winter storage and fuel prep>
Need help?
Having trouble starting your equipment? Stop by or contact your local Koenig Equipment service team. We’re here to get you running again. Koenig Equipment Locations>