BACKFIRE FLAME ARRESTOR
Gasoline engines installed in a vessel after April 25, 1940, except outboard motors, must be equipped with an acceptable means of backfire flame control. The device must be suitably attached to the air intake with a flame tight connection and is required to be Coast Guard approved or comply with SAE-J-1928 or UL 1111 standards and marked accordingly.
Arrestors are designed to prevent a backfirean explosion which can result when fuel spills or leaks in the engine area are ignited., which can result when fuel spills or leaks into the engine area and is ignited. Make a point to include arrestors in your monthly fire extinguisher inspection. Arrestors need to be cleaned periodically. During cleaning, ensure arrestors are securely fastened, and check for damage.