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It's the Law

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, be properly and efficiently vented to remove the fumes. It is recommended that at least one intake duct extend from a point midway to the bilge or below the level of the carburetor air intake, and at least one exhaust duct extend from the open atmosphere to the lower bilge.

If your vessel is equipped with a power ventilation system, turn it on for at least six minutes in either of these situations:

  • After fueling
  • Before starting the 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.

Regularly check the ventilation ducts for obstructions, such as birds’ nests. Make sure you can feel air coming out of the cowl when the ventilation system is turned on.

Ventilation system
Properly installed ventilation systems greatly reduce the chance of a life-threatening explosion.