It's the Law: Required Equipment

Ventilation Systems

The purpose of ventilation systems is to avoid explosions by removing flammable gases. Properly installed ventilation systems greatly reduce the chance of a life-threatening explosion.

• All gasoline-powered vessels, constructed in a way that would entrap fumes, must have at least two ventilation ducts fitted with cowls to remove the fumes.
• If your vessel is equipped with a power ventilation system, turn it on for at least four minutes after fueling and before starting your engine.
• If your vessel is not equipped with a power ventilation system (for example, a personal watercraft), open the engine compartment and sniff for gasoline fumes before starting the engine.

Backfire Flame Arrestors

• Because vessel engines may backfire, all power-driven vessels (except outboards) that are fueled with gasoline must have a U.S. Coast Guard–approved (comply with SAE J-1928 or UL 1111 standards) backfire flame arrestor on each carburetor.
• Periodically clean the flame arrestor and check for any damage.

Mufflers and Noise Level Limits

Excessive noise can prevent a vessel operator from hearing signals and voices.

• A vessel’s engine must have a muffler or exhaust water manifold for noise reduction or another effective muffling system.
• The use of cut-outs or exhaust stacks is prohibited.
• It is illegal to operate a powerboat or PWC, or allow others to operate it, in such a manner that the noise level exceeds 86 decibels measured at 50 feet from the vessel. You must submit to a noise level test if requested by a law enforcement officer.
• It is illegal for recreational boaters to use or have on board a siren of any type while operating on the waters of Alabama.