Lawn & Garden Equipment Engines With Reduced Emissions The EPA found that small spark-ignition engines of 25 hp or less contribute about 20 percent of hydrocarbon emissions and 23 percent of carbon monoxide emissions from all mobile sources. As a result of this perceived problem, the EPA has issued new regulations on small engines. |
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Expert Says Take Care Of Air Filters On Small Engines Many homeowners have several small engines in the garage or tool shed on equipment like a lawnmower or string trimmer. Some may also have a garden tiller, a hedge trimmer, a lawn edger or a chainsaw. Most of these small engines have an air filter. |
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