Join Date: Feb 2010
Location: Narragansett Bay
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Re: Exhaust under water
Stinkpot exhausts are typically engineered below the waterline, with proper diameter, etc. The OP’s was reportedly design above. Adding resistance underwater, for an exhaust that is above the waterline to begin with, could be significant. Bends in the run, as well as exhaust diameter matter, so I’m sure blocking the exit with water is too.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.