Mercruiser Bravo Impeller Problem

[n303cb]

I just replaced the impeller and housing on Mercruiser 7.4 Liter and it will not pump water. I replaced the impeller again, attached the intake hose, water was coming into the housing, but it would not pump it out of the housing. Seems elementary to me, but I cannot figure out why it will not pump. O=ring is new and plate is new. Housing is new and impeller is new. Water freely flows to the pump, but it will not pump. Very frustrating. Any thoughts?

 

[Don S]

Re: Mercruiser Bravo Impeller Problem

You have the 2 hoses going into the back of the pump backwards............Don't ask how I know this. <br />The picture below is for a 93-97 raw water cooled engine. If you have something else, let me know.<br /><br />

 

[newport dave]

Re: Mercruiser Bravo Impeller Problem

On a stanard rotation engine the inlet hose is the connected to the top/outer hose connection on the back of the pump and the outlet hose is connected to the lower/inner hose connection. Also be sure that there are no leaks in the inlet hose (vacuum leaks) as they can prevent the pump from working.<br /><br />Dave