Westerbeke W46 Sludge in Cooling System

Author Message   F. Albert Boersma New member Username: wyeriver Post Number: 1 Registered: 11-2009 Posted on Saturday, November 07, 2009 - 12:31 pm:    W46 started to overheat. Removed thermostat and found bottow plugged with brown sludge. Wiped adjacent orifices with a rag and got more sludge, but not the big glob found on the thermostat. Would like to clean and flush cooling system, but Parts Manual shows only 2 brass 1/8" NPT plugs located on both side of forward end on engine. Both plugs are virtually inaccessible. How do I drain the block & transmission and flush the system to get all the cleaning agent out and new anti-freeze back in?

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