Backfire Flame Arrestors
All motorboats built after April 1940, with inboard-mounted gasoline engines (this includes inboards, inboard-outboards, and airboats) must have a backfire flame control device mounted securely to each carburetor.
- Backfire flame arrestors must be:
- In good and serviceable condition
- U.S. Coast Guard–approved (must comply with SAE J-1928 or UL 1111 standards)
- It is illegal to have any holes in the mesh of the backfire flame arrestor.
- Periodically clean the flame arrestor(s) and check for any damage.