The Massachusetts Boater Safety Handbook
The Official Boating Handbook of the Massachusetts Department of Natural Resources - Web Version
Table of Contents
Backfire flame arrestors are designed to prevent the ignition of gasoline vapors in case the engine backfires. All gasoline-powered motorboats, except outboards, must have a backfire flame arrestor on each carburetor that is USCG–approved (must comply with SAE J-1928 or UL 1111 standards).