[C320-list] Raw water system

[Chris Burti]

We were running the engine to heat water or charge the batteries or
something once in our old O'Day in shallow water and sucked enough sand in
to score the pump cover. We glued emery cloth to a flat board and "surfaced"
the cover by rubbing in on the sanding board for about thirty minutes. That
was a whole lot cheaper than rebuilding the pump and it work perfectly as
long as we owned the boat.

On Mon, Jan 11, 2010 at 11:55 AM, Jeff Hare <catalina at thehares.com> wrote:

>
> Hey,  (translated "hi" elsewhere)
>
> I have experienced this problem from time to time even with a brand new
> impeller.
>
> I suspect two things:
> 1. My pump body is worn and the impeller doesn't make a tight seal even
> with a new impeller.
> 2.  My raw water intake hose leading to the pump loops up too high for my
> current pump.
>
> I plan to replace the pump this spring and lower the hump in the hose a
> little.
>
> I have checked that the through hull, strainer, pump and exchanger are all
> clear.  Also, I observed that by dabbing impeller grease in the pump housing
> it draws water without priming.  So, my conclusion is that the scoring on
> the outer plate of the pump is preventing a good vaccuum from forming.
>
> Sooo.  Loosen the pump inlet hose and get air out of the line and water
> into pump.  If it pumps water now, you *may* have one or both of the above
> problems.
>
> -Jeff
>  ------Original Message------
> From: james_delong
> Sender: c320-list-bounces at lists.catalina320.com
> To: c320-list at lists.catalina320.com
> ReplyTo: C320-List at Catalina320.com
> Subject: [C320-list] Raw water system
> Sent: Jan 11, 2010 9:35 AM
>
> Y'all, (I'm allowed to use that term as I'm in Georgia)
>
> Anyway...
>
> I have an issue with the raw water system.  It seems to work intermently!
>
> Yep...checked the sea cock (clear), strainer (clear) and impeller (new)....
>
> What is next?  I'm assuming the raw rater pump itself (do these fail?),
> heat exchanger and the mixing elbow, but don't want to tackle those without
> some indication either of these could be the culprit!
>
> Some history.  Once we smelled rubber burning like the pump stopped
> rotation.  After checking this and tightening the belt all was OK.  A couple
> of other times there was no exhaust water, but the next time there was!
>  After the last sail, all was OK.  But starting the boat at the dock now
> results in no flow at all.
>
> Ideas?
>
> Thanks,
>
> Jim #453
>
>


-- 
Chris Burti Farmville, NC