Wayne.B wrote in
:

It will need to be repaced unless you can get it welded up but I'd
repace it if it was mine. If water gets back into the cylinders you
will have a very expensive repair on your hands.



If the exhaust backpressure gets high enough to overcome the seawater pump
and empties that heat exchanger of seawater cooling, he'll have lots more
damage than water in the cylinders can make.....