Originally Posted by zimnz
I too am looking for feedback on this question, please?
Not a Leopard owner but any engine
which might, in some conditions, become lower than the outside water
level (such as in your leeward hull) can be subject to flooding and hydrolock.
I've experienced it, not fun.
A syphon break in the cooling water
output line between the heat exchanger
and the exhaust
injection point in the exhaust elbow
is important and easy to do.
Mine is a long loop going to a high point with a small "T" at the top and a small hose going into a cockpit
drain.When the engine is running a small amount of water squirts out the small hose. (I can see and hear this). When the engine is stopped air gets into the system through the small hose and prevents water from syphoning into the exhaust manifold and then into a cylinder.