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The Pennsylvania Code website reflects the Pennsylvania Code changes effective through 51 Pa.B. 1118 (February 27, 2021).

58 Pa. Code § 95.6. Backfire flame control.

§ 95.6. Backfire flame control.

 (a)  Gasoline engines, except outboard motors, shall be equipped with an acceptable means of backfire flame control. Installations consisting of a backfire flame arrestor bearing basic United States Coast Guard Approval Numbers 162.016 or 162.041 or engine air and fuel induction systems bearing basic United States Coast Guard Approval Numbers 162.15 or 162.42 may be continued in use as long as they are serviceable and in good condition. New installations or replacements shall meet the requirements of this section.

 (b)  The following are acceptable means of backfire flame control for gasoline engines:

   (1)  A backfire flame arrestor complying with SAE J-1928 or UL 1111 and marked accordingly. The flame arrestor shall be suitably secured to the air intake with a flame tight connection.

   (2)  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 acceptable backfire flame arrestor. A gasoline engine utilizing an air and fuel induction system, and operated without an approved backfire flame arrestor, shall either include a reed valve assembly or be installed in accordance with SAE J-1928.

   (3)  An arrangement of the carburetor or engine air induction system that will disburse flames caused by engine backfire. The flames shall be disbursed to the atmosphere outside the vessel so that the flames will not endanger the vessel, persons onboard or nearby vessels and structures. Flame dispersion may be achieved by attachments to the carburetor or location of the engine induction system. Attachments shall be of metallic construction with flame tight connections and firmly secured to withstand vibration, shock and engine backfire. Installations do not require formal approval and labelling but shall comply with this section.

 (c)  Flame arrestors shall have tight connections and clean elements and may have no separation of grid elements which would permit flames to bypass the grid elements.


   The provisions of this §  95.6 adopted June 3, 1994, effective June 4, 1994, 24 Pa.B. 2795.

Cross References

   This section cited in 58 Pa. Code §  105.1 (relating to conditions requiring immediate corrective action).

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