Edward R. Cozzi

and pull all the spark plugs out. Crank the engine and see if water squirts out of the spark plug holes. If all the cylinders stay dry, it HAS to be the exhaust headers.

There really is no other way salt water can get to the cylinders.

MOBILEMERCMAN

How is it running? Did you do a compression or leak test yet? A low or dead cylinder will draw water in.

sonic28

fresh rebuild 20 hours compression good thru out.

Ted G

Does it have lengths of rubber hose between the headers and the transom? I have seen one of these break inside and act like a flap, made the water revert right back into the engine.

sonic28

no