[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: 46CFR182.420]

[Page 271-272]
 
                           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. 182.420  Engine cooling.

    (a) Except as otherwise provided in paragraphs (b), (c), (d), and 
(e) of this section, all engines must be water cooled and meet the 
requirements of this paragraph.

[[Page 272]]

    (1) The engine head, block, and exhaust manifold must be water-
jacketed and cooled by water from a pump that operates whenever the 
engine is operating.
    (2) A suitable hull strainer must be installed in the circulating 
raw water intake line of an engine cooling water system.
    (3) A closed fresh water system may be used to cool the engine.
    (b) An engine water cooling system on a vessel of not more than 19.8 
meters (65 feet) in length carrying not more than 12 passengers, may 
comply with the requirements of ABYC Project P-4, ``Marine Inboard 
Engines,'' instead of the requirements of paragraph (a) of this section.
    (c) On a vessel of not more than 19.8 meters (65 feet) in length 
carrying not more than 12 passengers, a propulsion gasoline engine may 
be air cooled when in compliance with the requirements of ABYC Project 
P-4.
    (d) An auxiliary gasoline engine may be air cooled when:
    (1) It has a self-contained fuel system and it is installed on an 
open deck; or
    (2) On a vessel of not more than 19.8 meters (65 feet) in length 
carrying not more than 12 passengers, it is in compliance with the 
requirements of ABYC P-4.
    (e) A propulsion or auxiliary diesel engine may be air cooled or 
employ an air cooled jacket water radiator when:
    (1) Installed on an open deck and sufficient ventilation for 
machinery cooling is available;
    (2) Installed in an enclosed or partially enclosed space for which 
ventilation for machinery cooling is provided, which complies with the 
requirement of Sec. 182.465(b), and other necessary safeguards are 
taken so as not to endanger the vessel; or
    (3) Installed on a vessel of not more than 19.8 meters (65 feet) in 
length carrying not more than 12 passengers, in compliance with the 
requirements of ABYC Project P-4.