As of Jan. 1,2004, LSI (large spark-ignited) nonroad, spark-ignition engines began its first tier of EPA exhaust emissions regulations. A second, more stringent set of LSI regulations are scheduled for 2007. The engines involved are over 19 kW and certified for operation on LNG, gasoline, or dual fuel and must be certified on a yearly basis and when new product families are developed. Applications are primarily sweepers, forklifts, aerial lifts, and other mobile equipment.
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