[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR182.415]

[Page 271]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 182_MACHINERY INSTALLATION--Table of Contents
 
                Subpart D_Specific Machinery Requirements
 
Sec. 182.415  Carburetors.

    (a) All carburetors except the downdraft type must be equipped with 
integral or externally fitted drip collectors of adequate capacity and 
arranged so as to permit ready removal of fuel leakage. Externally 
fitted drip collectors, must be covered with flame screens. Drip 
collectors, where practicable, should automatically drain back to engine 
air intakes.
    (b) All gasoline engines installed in a vessel, except outboard 
engines, must be equipped with an acceptable means of backfire flame 
control. Installation of backfire flame arresters bearing basic Approval 
Numbers 162.015 or 162.041 or engine air and fuel induction systems 
bearing basic Approval Numbers 162.042 or 162.043 may be continued in 
use as long as they are serviceable and in good condition. New 
installations or replacements must meet the applicable requirements of 
this section.
    (c) The following are acceptable means of backfire flame control for 
gasoline engines:
    (1) A backfire flame arrester complying with Society of Automotive 
Engineers (SAE) J-1928, ``Devices Providing Backfire Flame Control for 
Gasoline Engines in Marine Applications,'' or UL 1111, ``Marine 
Carburetor Flame Arrestors,'' and marked accordingly. The flame arrester 
must be suitably secured to the air intake with a flametight connection.
    (2) An engine air and fuel induction system that provides adequate 
protection from propagation of backfire flame to the atmosphere 
equivalent to that provided by an acceptable backfire flame arrester. A 
gasoline engine utilizing an air and fuel induction system, and operated 
without an approved backfire flame arrester, must either include a reed 
valve assembly or be installed in accordance with SAE J-1928, or other 
standard specified by the Commandant.
    (3) An arrangement of the carburetor or engine air induction system 
that will disperse any flames caused by engine backfire. The flames must 
be dispersed to the atmosphere outside the vessel in such a manner that 
the flames will not endanger the vessel, persons on board, or nearby 
vessels and structures. Flame dispersion may be achieved by attachments 
to the carburetor or location of the engine air induction system. All 
attachments must be of metallic construction with flametight connections 
and firmly secured to withstand vibration, shock, and engine backfire. 
Such installations do not require formal approval and labeling but must 
comply with this subpart.
    (4) An engine air induction system on a vessel with an integrated 
engine-vessel design must be approved, marked, and tested under Sec. 
162.043 in subchapter Q of this chapter, or other standard specified by 
the Commandant.