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Old 07-31-2008
oft oft is offline
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Exhaust Temperature

Does anyone know what temperature the exhaust gas might reach on a raw water cooled marine diesel (a 1977 Yanmar YSB8) and/or how hot the exhaust elbow will get? I know that raw water engines seem to operate at a temperature around 140F, but presumably the exhaust gas and elbow exceed this.

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Old 07-31-2008
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oft...
The elbow will be much hotter. The injected raw water will not be able to cool all of it. Mine, a raw water-cooled MD17C is far, far too hot to touch.
It is a tough call to know how hot the hottest part of it would be.
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