water in oil

[baydreamer]

Trying to figure out what my problem may be.oil in water and the rear spark plug is fouled with rust colored deposits. Other plugs look fine . Mercruiser 130 4 cylinder. Bad manifold, blown headgasket or cracked block

 

[cobra 3.0]

Re: water in oil

Probably a blown head gasket ...but until you take off the head, it's hard to say.

 

[Haut Medoc]

Re: water in oil

Fresh water cooled or raw water cooled?....I would pull the manifold/riser & have a look .... A cracked block would be my first guess....<br />Did you not winterize?<br />How old is the manifold? A cracked/porous manifold or riser is the #2 cause of water in oil....A leak at the gasket where the two meet perhaps?<br />A blown headgasket would take awhile to get a noticable amount of water in oil.....<br />The first thing I would do is pressure test the cooling system & see if you can hear the leak..........JK

 

[KaGee]

Re: water in oil

READ THIS before proceeding.