R651-201-1. Approved  


Latest version.
  • "Approved" means approved by the commandant of the United States Coast Guard, unless the context clearly requires a different meaning. For carburetor backfire flame control devices "approved" means the device is marked with one of the following: a U.S. Coast Guard approval number; complies with Underwriters Laboratory test UL 1111; or complies with the Society of Automotive Engineers test SAE J-1928.