I have recently purchased a 1975 27' Catalina with a raw H2O cooling system (My first engine of this type on a sail boat usually have an outboard). While moving my new purchase to my marina I ran into some overheating problems. My first issue was as we were motor sailing she heeled over exposing the H2O intake port and created an air lock in the intake hose. As soon as I noticed that the engine hit 200+ I turned her off. Ever since then I have had issues with cooling. I have removed and inspected the impeller where I noticed that the gasket was worn so I replaced it. I then followed the cooling Hose to the Thermostat (Periodically unhooking the hoses and running the engine briefly to verify good water flow) I have cleared all of the hoses and verified that there is good H2O flow before and after the thermostat. I then noticed that the port on the other end of the manifold was not receiving good H2O flow, but when I removed the Manifold drain plug I get water to come out. I am presuming that I have a blockage somewhere in this manifold plate. I have purchased a drill impeller pump to "Back Flush" this portion of the cooling system up to the thermostat as I cannot get any water flow out of the other end of the manifold other than from the drain plug. Are there chambers/ports underneath this plate that doing this would result in additional problems?
Thank you in advance for any information
Thank you in advance for any information
Comment