Hull Number 33
Join Date: Apr 2009
Location: Newport Beach, CA
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Rep Power: 7
Having had " dry exhaust" risers crack and disintegrate from rust or corrosion inherent in marine environments and vibration, I'd recommend spending a little more for the Universal elbow that fits and then running rubber exhaust hose to a plastic Vetus type pot, then rubber again with a loop above the waterline to the discharge.
One " homemade" Galvanized elbow I had was only held together by the heat wrap after the heat and salt water got to it.
The extra expense and an anti siphon break is worth the potential " water suck" that really ruins your day ( and your engine.)
The potential for CO poisoning also exists if your exhaust has an undiscovered crack hidden by the heat wrap.