571—37.4(462A) Flame arrestors.

All motorboat engines, except outboard engines, shall be equipped with an efficient flame arrestor, backfire trap or other similar device. An acceptable flame arrestor shall have evidence of compliance with UL Standard 1111 (October 31, 2008) or the revised 2020-02 Society of Automotive Engineers Standard J1928, titled “Devices Providing Backfire Flame Control for Gasoline Engines in Marine Applications.”

[ARC 9219C, IAB 5/14/25, effective 6/18/25]