Current through Vol. 24-04, March 15, 2024
Rule 6.
(1) Every
gasoline engine installed in a motorboat after April 25, 1940, except outboard
motors, shall be equipped with an acceptable means of backfire flame
control.
(2) Installations made
before November 19, 1952, need not meet the requirements of this rule and may
be continued in use as long as they are serviceable and in good condition.
Replacements shall meet the requirements in this rule.
(3) Installations consisting of backfire
flame arresters bearing United States coast guard approval no. 162.015 may be
continued in use as long as they are serviceable and in good condition.
Replacements shall meet the requirements of this rule.
(4) Installations consisting of engine air
and fuel induction systems and given United States coast guard approval no.
162.015 may be continued in use as long as they are serviceable and in good
condition. Replacements shall meet the requirements of this rule.
(5) The following are acceptable means of
backfire flame control for gasoline engines:
(a) A backfire flame arrester constructed in
accordance with specifications of, and approved by, the United States coast
guard. The flame arrester shall be suitably secured to the air intake with
flame-tight connections.
(b) An
engine air and fuel induction system which provides adequate protection from
propagation of backfire flame to the atmosphere equivalent to that provided by
an approved backfire flame arrester. A gasoline engine utilizing an air and
fuel induction system, and operated without an approved backfire flame arrester
shall have the installation tested and labeled in accordance with the
specifications of, and approved by, the United States coast guard.
(c) Any attachment to the carburetor or the
engine air induction system to ensure that flames caused by engine backfire
will be dispersed to the atmosphere outside the vessel so that the flames will
not endanger the vessel, persons on board, or nearby vessels and structures.
All attachments shall be of metallic construction with flame-tight connections
and firmly secured to withstand vibration, shock, and engine backfire. The
installations do not require formal approval and labeling, but will be accepted
by state and local law enforcement officers on the basis of compliance with
this rule.
(d) If manufacturers
produce an integrated engine-vessel design, a pre-market approval of an engine
air induction system is available. An installation shall be tested and labeled
in accordance with specifications approved by the United States coast
guard.
