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Next to get done is to replace the big cast iron mufflers for the two 454's in the Summer Palace. I notice that there are two types of fiberglass mufflers offered. One is an in-line type and the other is a top exit model. Our cast iron mufflers are the inline type. What are the pluses and minuses of each type beyond the obvious? I can see that it is easier to get the inlines hung well above the water line. There is also a cast iron muffler for the Koler genset. It may be original as it has the Chris Craft logo cast into it. Depending on what it looks like, it too may have to go.
I have noticed there are newer (than the galvanized pipe fittings) fiberglass 45 elbows that collect the two hoses from the risers and feed to the mufflers for each of the engines. Isn't the water exiting the risers too hot to be using fiberglass? It would seem best to use some galvanized fittings and nipples there, or stainless even better.