What is the purpose of an inboard engine ventilation system?
The purpose of a ventilation system is to circulate fresh air on your boat. Ventilation will remove gas fumes from the hull and engine compartments, which will help prevent a fire or explosion from occurring.
Where do gas and propane fumes accumulate in a boat?
They accumulate in the bilge, the lowest part of the boat. Both gasoline and propane fumes are heavier than air. For that reason it’s very important that the bilge of a boat has sufficient ventilation. Most boats have an electric ventilator that is switched on a few minutes before you start the engine.
What does the blower on a boat do?
A Bilge Blower on a boat is a fan that is used to remove flammable fumes from the engine compartment. This is to help prevent an explosion in the engine compartment whenever the engine is turned on after sitting for an extended period of time. The fumes that build-up are usually caused by a leak in a gas line or hose.
How long should you operate your boat’s engine ventilation system before starting the engine?
Before starting engine, operate blower for four minutes and check (using your nose) engine compartment for gasoline vapours.
Why does an inboard engine exhaust into the water?
These inboard engines usually use water for cooling, but it does not combine with the exhaust gas, but simply discharges back into the water. So, while wet exhaust engines will, in fact, exhaust into the water, dry exhaust engines will exhaust into the air. What Happens when Exhaust Goes Underwater?
Where does the exhaust go in a boat?
Outboard engines will discharge exhaust gases underwater, typically through the propeller, while the exhaust from inboard engines appears just above the waterline, along with the discharge of cooling water.
How does a water cooled exhaust system work?
Water-cooled inboard engines inject cooling water into the exhaust pipe, which cools the exhaust and muffles engine noise. The exhaust then pushes the water out the exhaust pipe. This is known as a wet exhaust system.
What causes an inboard / outboard motor to overheat?
Radiator and Thermostats. Some inboard-outboard marine engines contain a closed loop cooling system that consists of a radiator, which uses anti-freeze (coolant) for the purpose of cooling the engine passages and wet exhaust manifold. Overheating problems manifest when the radiator cores become clogged with rust and residual oil and sludge.
Outboard engines will discharge exhaust gases underwater, typically through the propeller, while the exhaust from inboard engines appears just above the waterline, along with the discharge of cooling water.
These inboard engines usually use water for cooling, but it does not combine with the exhaust gas, but simply discharges back into the water. So, while wet exhaust engines will, in fact, exhaust into the water, dry exhaust engines will exhaust into the air. What Happens when Exhaust Goes Underwater?
How does a boat get air into the engine room?
The easy way to do this is with a blower that sucks air out of the compartment. A 3″ or 4″ in line blower drawing compartment air, typically aft and out the transom or aft deck through clam shells or louvers.
How does exhaust blower work in engine room?
Exhaust blowers increase airflow by creating negative pressure that draws in cool air through the passive intake vents, pulling it through the engine room and ejecting it, along with the heat it picked up along the way.