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Tightening a fuel cap

After fueling:

  • Put the fill cap on tightly to prevent vapors from escaping.
  • Open all windows, ports, doors, and other openings.
  • If your boat is equipped with a power ventilation system (exhaust blower), turn it on for at least four minutes before starting your engine. This will help eliminate fuel vapors in the bilge.
  • Before starting the engine, sniff the bilge and engine compartment for fuel vapors. Continue ventilating until you cannot smell any fuel vapors. Consider installing a gas vapor detection and alarm device.
  • Start the engine and then reload your passengers.