Fact or Fiction: Lower Emissions The Environmental Protection Agency (EPA) states "the reductions in NOx and particulate matter from non-road diesel engines, similar to those technologies used in highway diesel trucks and buses, will provide enormous public health benefits." The elimination of sulfur and other impurities also makes diesel significantly cleaner than in years past. The question is how much cleaner is diesel than the other alternatives for zero-turn mowers. When comparing emissions per hour of mowing, data collected from the EPA show that LP-fueled engines emit higher levels of carbon dioxide (CO2) and carbon monoxide (CO) than Clean Diesel mowers, and certification results from the California Air Resources Board (CARB) indicate that LP-fueled engines emit dramatically higher levels of oxides of nitrogen (NOx) and carbon monoxide (CO) than comparable Clean Diesel engines. The table below illustrates sample 2011 emissions results from the EPA and CARB: The diesel engine represented in the above chart is used in Grasshopper equipment and though it is larger and more powerful than the closest comparable gasoline models, it emits less carbon dioxide, non-methane hydrocarbon, less oxides of nitrogen and less carbon monoxide than the smaller gasoline and LP engines. NOx represents a source of greenhouse gas, and carbon monoxide is a deadly, odorless gas. In light of this, the cleaner, economical alternative for the landscape professional is a diesel-powered Grasshopper mower.

Model 325D MidMount™ is equipped with a clean-running 25-hp MaxTorque™ diesel engine. These Tier 4 Final compliant diesel engines have consistently out-performed gasoline and LP engines in emissions tests in certain greenhouse gas measurements.

Did You Know?
LP engines emit 30 times more carbon monoxide than comparable diesel engines and also emit nearly 30 percent higher levels of hydrocarbons and nitrogen oxides than comparable diesel engines. Source: CARB certification reports