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

This page last reviewed August 13, 2012

Off-Road Large Spark-Ignition Equipment

Guidance Documents and Advisories



(All documents are provided in Adobe Acrobat (PDF) unless otherwise indicated.)

Implementation advisories concerning the Off-Road Large Spark-Ignition Equipment regulation:

  • 08-01: Delay in Enforcement of first LSI Compliance Date.  Allow Purchase Orders into Flee t Average Calculation.
  • 08-02: Exclusion of Gasoline-Fueled Ground Support Equipment from the LSI Fleet Adverage Calculation. 
  • 08-03:  Exclude from the fleet average calculation fully controlled late model year LSI equipment fleets and LSI equipment with engines greater than three liters in displacement ; Extend deadline for use of purchase orders in the fleet average calculations.
  • Mail-Out #MSC 09-44: EXCLUSION OF GASOLINE-FUELED AIRPORT GROUND SUPPORT EQUIPMENT FROM THE LARGE SPARK IGNITION (LSI) ENGINE FLEET AVERAGE REQUIREMENTS
  • Mail-Out #MSC 09-45: INCLUSION OF ELECTRIC EQUIPMENT OF LESS THAN 19 KILOWATTS IN LARGE SPARK IGNITION (LSI) FLEET AVERAGE CALCULATIONS
  • Mail-Out #MSC 10-08:  EXCLUSION OF RETIRED LARGE SPARK IGNITION (LSI) ENGINE EQUIPMENT FROM FLEET SIZE DETERMINATIONS AND FLEET AVERAGE CALCULATIONS
  • Mail-Out #MSC 10-15:  EXCLUSION OF GREATER THAN THREE LITER DISPLACEMENT LARGE SPARK IGNITION (LSI) ENGINE EQUIPMENT FROM THE LSI FLEET AVERAGE CALCULATIONS UNTIL APRIL 16, 2011
  • Mail-Out #MSC 10-16:  EXCLUSION OF FULLY CONTROLLED LATE MODEL YEAR LARGE SPARK IGNITION (LSI) ENGINE EQUIPMENT FROM THE LSI FLEET AVERAGE CALCULATIONS UNTIL APRIL 16, 2011
  • Mail-Out #MSC 11-20:   EXCLUSION OF GREATER THAN THREE LITER DISPLACEMENT LARGE SPARK IGNITION (LSI ) ENGINE EQUIPMENT FROM THE LSI FLEET AVERAGE CALCULATIONS UNTIL APRIL 16, 2012
  • Mail-Out #MSC 11-21:   EXCLUSION OF FULLY CONTROLLED LATE MODEL YEAR LARGE SPARK IGNITION (LSI) ENGINE EQUIPMENT FROM THE LSI FLEET AVERAGE CALCULATIONS UNTIL APRIL 16, 2012
  • Mail-Out #MSC 11-22:   EXCLUSION OF LIMITED HOURS OF USE EQUIPMENT FROM THE LARGE SPARK IGNITION (LSI) ENGINE FLEET AVERAGE REQUIREMENTS

Enforcement advisories concerning the Off-Road Spark-Ignition Equipment regulation:

  • Advisory 441:  ENFORCEMENT OF THE IN-USE OFF-ROAD LARGE SPARK-IGNITION ENGINE FLEET REGULATION


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