MERCRUISER EXHAUST MANIFOLD DRY FLANGE EXPLAINED AND PRESSURE TEST SET UP.

After seeking a video , I couldn’t find anything so created this. Symptom is raw water in engine cylinder causing hydro lock after running engine. No water in oil and noted this engine runs hotter than the other and loses power. It will miss fire, struggle to run , quit and lock up. Let it sit and fires up again. I wanted to check and test my Ex Manifolds first before getting into the engine. Here ya go.