Manfred,
I'm attaching a short tech note on Catalina 30 water issues which may help you although your symptoms do not quite fit the standard Catalina 30 water entering from the exhaust syndrome.
The only way water can get from the exhaust to the oil pan is through the combustion chambers which should prevent your engine from running. If, after cleaning things up and keeping the through-hull closed whenever the engine is not running, the engine continues to run well while water continues to enter the crankcase, we'll have to consider a crack somewhere in the cooling jacket in the block.
Don
|