[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: 40CFR91.121]

[Page 309]
 
                   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 B--Emission Standards and Certification Provisions
 
Sec. 91.121  Certification procedure--recordkeeping.

    (a) The engine manufacturer must maintain the following adequately 
organized records:
    (1) Copies of all applications and summary information, as 
applicable, filed with the Administrator;
    (2) A copy of all data obtained through the production line and in-
use testing programs; and
    (3) A detailed history of each test engine used for certification 
including the following:
    (i) A description of the test engine's construction, including a 
general description of the origin and buildup of the engine, steps taken 
to insure that it is representative of production engines, description 
of components specially built for the test engine, and the origin and 
description of all emission-related components;
    (ii) A description of the method used for engine service 
accumulation, including date(s) and the number of hours accumulated;
    (iii) A description of all maintenance, including modifications, 
parts changes, and other servicing performed, and the date(s), and 
reason(s) for such maintenance;
    (iv) A description of all emission tests performed, including 
routine and standard test documentation, as specified in subpart E of 
this part, date(s), and the purpose of each test;
    (v) A description of all tests performed to diagnose engine or 
emission control performance, giving the date and time of each and the 
reason(s) for the test; and
    (vi) A description of any significant event(s) affecting the engine 
during the period covered by the history of the test engine but not 
described by an entry under one of the previous paragraphs of this 
section.
    (b) Routine emission test data, such as test cell temperature and 
relative humidity at start and finish of test and raw emission results 
from each mode or test phase, must be retained for a period of one year 
after issuance of all certificates of conformity to which they relate. 
All other information specified in paragraph (a) of this section must be 
retained for a period of eight years after issuance of all certificates 
of conformity to which they relate.
    (c) Records may be kept in any format and on any media, provided 
that, at the Administrator's request, organized, written records in 
English are promptly supplied by the manufacturer.
    (d) The manufacturer must supply, at the Administrator's request, 
copies of any engine maintenance instructions or explanations issued by 
the manufacturer.