2006 mariah motor
 

Couple of freeze plugs came out last winter, have checked oil looks good, do have a crack in the exhaust manifold. Cannot get water to cycle thru the engine, you can tell the exhaust manifold is hot but the temp gauge is not coming up either. Any clue what I need to start with? I've had this boat since 2008 and never had any issues. :confused:

Re: 2006 mariah motor
 

What engine? I would probably start with the raw water impeller.

Re: 2006 mariah motor
 

4.3 mercruiser I/o

Re: 2006 mariah motor
 

so that would have alpha 1, which has an impeller inside of it, rather than mounted on the engine, when that goes bad, and they do. Then no water gets pumped into the engine.

Re: 2006 mariah motor
 

Awesome thank you will try that!