A boat's propulsion system is a complex unit that must function efficiently and smoothly at all times. Although car engines can still operate with some wear and tear, marine propulsion systems do not have the luxury. The reason is that breakdowns out at sea can have far-reaching consequences, considering that the nearest source of aid could be hundreds of nautical miles away. Since marine exhaust manifolds are part of the propulsion system, optimal performance is paramount. It is the reason most boats have water-cooled exhaust manifolds, and this post explores the benefits of these exhaust manifolds.
Dampen Engine Noise
There is nothing more annoying than having your conversations muffled by a boat's exhaust as you try to enjoy time with family and friends. A water-cooled exhaust system helps dampen engine noise significantly by injecting water into the manifold. The water is then transported and pushed out of the exhaust manifold, and the cycle continues. Boat owners with water-cooled exhaust manifolds in their vessels appreciate the quiet environment the system creates, allowing them to enjoy their time out at sea.
Dual Purpose Muffler
There is no doubt that a water-cooled exhaust manifold reduces engine noise. However, it has not stopped manufacturers from including a muffler in the exhaust system to reduce noise further. Notably, the muffler in a water-cooled exhaust system serves another function; an outlet for excess water. Water-cooled exhaust systems use ocean water to prevent heat buildup, but it is difficult to control the amount of water the system sucks. Therefore, salty ocean water could easily get inside an engine and wreak havoc on critical parts. Over time, an engine becomes less efficient and eventually breaks down. However, since a muffler is installed close to the rise, it acts as a secondary discharge outlet where excess water flowing into the exhaust system can exit. Thus, it eliminates the possibility of excess water finding its way into an engine.
Reduce Fumes Buildup
Excess heat is detrimental to marine engines because it leads to inefficiencies, causing the system to work extra hard and wear out. In the process, an outboard or an inboard engine produces excess dangerous fumes -- carbon monoxide, hydrocarbons, and nitrogen oxides. As the fumes build up in the manifold and the general exhaust system, they can find their way into the cabin, leading to asphyxiation or an explosion. A water-cooled exhaust keeps temperatures at optimal levels within the system, allowing an engine to work efficiently. Thus, it reduces the chances of fumes buildup or an explosion.
Talk to a marine professional to learn more about marine exhaust systems.
