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Exaust manifold question

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benmorrison

Member
"this might be a stupid questi

"this might be a stupid question bu im new to inboard engines, so here goes- what is the need of having water surrounding the manifold, and just how nesasary is this. is it just to reduce the exaust? or is it more for reducing the temp in the engine hatch? pretty much just curious about this but if anyone can answer this that would be great."
 
""Water" (coolant&

""Water" (coolant) in the exhaust manifolds is necessary, with an enclosure over the engine, mostly to minimize the "burn hazard". It also helps to control the temp inside the engine spaces. whether fresh or raw water is used is typically driven by the cost factor.

The cooling water get dumped into the exhaust "pipe" at the elbows. This mitigates some of the noise but reduces the temp of the exhust gases to something the typical rubber exhuast hose can survive with."
 
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