If you are looking to purchase a piece of nonroad equipment, choose the cleanest diesel engine that is practical for your use.  This guide uses engine certification data available from the U.S. Environmental Protection agency.

Cover page
Introduction
1-10 Horsepower Engines
11-25 Horsepower Engines
26-50 Horsepower Engines
51-75 Horsepower Engines
76-100 Horsepower Engines
101-175 Horsepower Engines
176-300 Horsepower Engines
301-600 Horsepower Engines
601-749 Horsepower Engines
750+ Horsepower Engines