It has become increasingly difficult to find gasoline free of ethanol, posing a challenge for owners of lawnmowers, leaf blowers and other equipment not designed for blended fuel. For those engines, the extra heat can create a safety risk. "All of us are OK with ethanol, all of us are OK with designing new products," said Kris Kiser, a spokesman for the Outdoor Power Equipment Institute. "We don't want anybody hurt."

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