What type of ventilation for inboard gasoline boats must have?

What type of ventilation for inboard gasoline boats must have?

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. At least one exhaust duct must extend from the open atmosphere to the lower bilge.

How do you ventilate a boat with an inboard engine?

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.

Which boats are required to have powered ventilation systems?

In a powered ventilation system, one or more powered blowers does the work of circulating air through the ducts. Powered ventilation systems are required on boats built after 1982 with installed fuel tanks or an enclosed engine.

What should every gasoline powered boat be equipped with?

Ignition-Protection Device. Because boat engines may backfire, the Small Vessel Regulations require that every pleasure craft that is fueled with gasoline or uses propane devices must have ignition-protected electrical devices.

How long should you operate the boats engine ventilation system before starting engine?

Gasoline vapours can explode. Before starting engine, operate blower for four minutes and check (using your nose) engine compartment for gasoline vapours.

What is the basic guideline for estimating amount of fuel?

What is the amount of fuel needed for a trip? A good rule of thumb regarding the amount of fuel needed for a trip is to ration one-third for the trip out, one-third for the return and one-third as reserve.

When to start a boat with a ventilation system?

It’s important to note that boats with powered ventilation systems should be turned on and let it run for four full minutes before starting the engine! This ensures all gasoline fumes have been removed before ignition.

Where are the ventilation ducts on a boat?

Ventilation systems must have two parts–an air inlet, and a separate air outlet. Both the inlet and the outlet must have ducts–which are tubes or hoses that extend down into the boat. Ducting for the exhaust must be located in the lower third of the hull–but above any bilge water.

When do you need a bilge blower on a boat?

It can be used in engine compartments, but only in conjunction with powered blowers. A bilge blower is important not only because it’s required, but because your life may depend on it. The USCG stipulates the use of a mechanical ventilation system for all non-open boats built after July 31, 1981 that run on gasoline.

Where are the intakes and exhausts on a boat?

Intakes are usually pointed forward, exhausts usually face aft. Boats must have a ventilation system that is adequate for the size space the system is used for. Larger boats with larger compartments must have more ventilation–the figure is 15 square inches of opening for each cubic foot of compartment.