Off-Road Large Spark-Ignition (Gasoline and LPG) Equipment Activities

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This area of the Off-Road Mobile Sources website pertains to off-road large spark-ignition (LSI) equipment greater than 25 horsepower, including farm, construction, and industrial equipment, powered by gasoline and liquefied petroleum gas (LPG), and other alternate fuels. Typical applications that use LSI engines include forklifts, large turf care equipment, portable generators, and other agricultural, construction, and general industrial equipment.

What's New (Posted August 13, 2012)
• ARB has received U.S. Environmental Protection Agency authorization to enforce the Large Spark-Ignition Engine Fleet Requirements Regulation (LSI Fleet Regulation), including the fleet average emission level standards. Enforcement Advisory 441 informs equipment operators of off-road LSI engine equipment that all provisions of the LSI Fleet Regulation are enforceable and that ARB intends to commence enforcement of all requirements of the regulation.
• ARB has updated the LSI Fleet Regulation tutorial to reflect regulatory changes that were adopted by the Board in December 2010. These changes were approved by the Office of Administrative Law on December 14, 2011, and became effective that same day.

For more information, go to: http://www.arb.ca.gov/msprog/offroad/orspark/orspark.htm