Raw water pump question

[blg2007]

I've been having problems with my boat having excess pressure on the circulating hoses. I took the boat out and run it yesterday, the temperature would jump up to 180 in only a few seconds, would return to 160 at idle. I've called a local volvo penta dealer and they said the raw water pump was bad, it was not supplying the engine with enough water to properly cool it. I've removed the pump to inspect. The impeller appears to be in good shape, however it looks like it is rubbing the back of the housing. You can see it in the picture below. It shouldnt be doing this should it? Also I have a drip coming from the exposed area of the shaft between the pulley and the pump housing, on this shaft there is an o-ring exposed. Is this right? Can be seen in picture.

Boat is a 1997 Caravelle S1900 Bowrider
Engine is a Volvo Penta 3.0L GS MLKD
Outdrive is Volvo Penta Cobra SX

 

[Don S]

Re: Raw water pump question

If you have a leak, it's probably sucking air instead of water and is why it's not pumping enough. If the pump leaks, replace it, or you will have water (and rust) on all your pulleys and everything on the front of youre engine.
You should also add informaiton like engine make, model, year, and what drive. Would make troubleshooting a lot easier.

 

[blg2007]

Re: Raw water pump question

If you have a leak, it's probably sucking air instead of water and is why it's not pumping enough. If the pump leaks, replace it, or you will have water (and rust) on all your pulleys and everything on the front of youre engine.
You should also add informaiton like engine make, model, year, and what drive. Would make troubleshooting a lot easier.

Thanks I've updated my question with the information.

 

[Don S]

Re: Raw water pump question

Boat is a 1997 Caravelle S1900 Bowrider
Engine is a Volvo Penta 3.0L GS MLKD
Outdrive is Volvo Penta Cobra SX

Add that information into your signature, and everyone will know what you have in any of the iboats forums you post in.

 

[blg2007]

Re: Raw water pump question

Wheres the best place to purchase a sea water pump for my particular unit?

 

[blg2007]

Re: Raw water pump question

Should I buy a new pump or try and re-build this one.

 

[bruceb58]

Re: Raw water pump question

Try these guys:

http://www.fasteddiesmarineparts.com/

 

[blg2007]

Re: Raw water pump question

Thanks for the replys, Having the pump re-built tomorrow, luckily it is the model that can be rebuilt. Pressure is normal according to volvo penta dealer.