I don't think it will solve, but it should help. I have the same problem in my Catalina 30..the 'dry stack' puts the manifold exit just barely up from horizontal where the water is injected. Although the metal is sound, I took it off since I'll be replacing all of the soft hose in the system, and had some between the injection point and muffler. I am considering re-designing this as well, but knowing about the possibility of water backing into the system will likely remind me to close the thru-hull if it doesn't start up easily.
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-Shawn
"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
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