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. Wet exhaust systems have the advantage of using the heat-absorbing and sound-dampening qualities of water to cool and quiet the exhaust. Air-cooled, or dry exhaust, systems are uncommon except in performance powerboats or large work boats where excessive heat buildup and/or noise are tolerable, or in precisely engineered trawler/passagemaker exhaust systems which insulate the hot exhaust pipe with forced air.
MIC supply professional and honest service.
Above- and below-waterline applications require distinctly different products to muffle engine noise. Powerboats use marine mufflers, commonly made out of non-metallic materials, to contain engine noise and cool the exhaust. Mufflers are always mounted above the waterline, and usually have some sort of check valve in-line to prevent backwards water flow, which might damage the engine.
Lift mufflers like Centek Vernalifts are used both by powerboats and sailboats. They are vertical mufflers mounted below the waterline with an outlet line coming off the top of the container. Exhaust gas and expended cooling water are mixed shortly after the exhaust manifold and travel together into the muffler's chamber where the cooling water collects before the exhaust gas pressure pushes it out the remainder of the exhaust hose. The mufflers's chamber also provides a place for seawater from following seas to collect if the boat is running under sail. For greater quieting, an inline muffler can be used downstream of a lift muffler.
For vessels with through-the-transom exhaust, there are flapper valves that prevent following seas from running back up the exhaust system and flooding the engine. They clamp around the outside diameter of an exhaust pipe to form a check valve.
For more information, please visit boat fuel fill hose.
A marine hose is a vital part of a boat. It is designed to provide the best possible long term performance and is built to withstand harsh sea conditions, abrasion, and a generally tough environment.
A marine exhaust hose is a heavy duty hose which is used as a flexible connection device to circulate, transfer and cool engine water. The marine exhaust hose is easy to install, is long-lasting and absorbs vibration more than pipe or tubing.
The Rubber Company stocks and manufactures an extensive range of marine hoses. Our marine fuel rubber hoses are designed to be both weather and ozone resistant, heat and oil resistant, non-flammable, resistant to tough sea conditions and abrasion resistant. Fuel rubber hoses are flexible. They are manufactured from different rubber compounds and then reinforced with sturdier materials to increase pressure resistance and durability.
Our stock of marine hoses also includes PVC nitrile sanitation hoses and marine waste PVC hose. With our extensive knowledge and expertise of the rubber industry in general, if you cannot find the product suitable for your application and require technical guidance, the team at The Rubber Company is here to help.