[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR91.301]

[Page 318]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 91--CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES--Table of 
Contents
 
              Subpart D--Emission Test Equipment Provisions
 
Sec. 91.301  Scope; applicability.


    (a) This subpart describes the equipment required in order to 
perform exhaust emission tests on new marine gasoline-fueled spark-
ignition propulsion engines subject to the provisions of subpart A of 
this part 91.
    (b) Exhaust gases are sampled while the test engine is operated 
using a steady state test cycle on an engine dynamometer. Exhaust gas 
sampling may be performed using either the raw gas sampling method or 
the constant volume sampling (CVS) method. The exhaust gases receive 
specific component analysis determining concentration of pollutant, 
exhaust volume, the fuel flow, and the power output during each mode. 
Emissions are reported on a gram per brake-kilowatt hour (g/kW-hr). See 
subpart E of this part for a complete description of the test procedure.
    (c) Additional information about system design, calibration 
methodologies, and so forth, for raw gas sampling can be found in part 
86, subpart D of this chapter. Examples for system design, calibration 
methodologies, and so forth, for dilute sampling can be found in part 
86, subpart N of this chapter.