[C320-list] Fwd: Impeller housing leak.

[Chris Burti]

I'll build on Jeff's comments about the worn plate...in our case, back in
the1980's, we had a worn pump that became problematic during a cruise and a
replacement pump couldn't be obtained in a timely fashion. So we glued a
pieces of 400/ 600/ 800 grit wet/dry sandpaper to glass and progressively
sanded out the grooves in the cover plate. With a new impeller, this was
more than adequate to proceed and we saved the old pump as an adequate
emergency spare after installing the replacement when it arrived.

CB
Commitment, #867

Chris Burti
Farmville, NC


On Fri, Jul 22, 2016 at 8:11 AM, Jeff Hare <Catalina at thehares.com> wrote:

> Hi Greg,
>
> Thanks, that's what we found as well about 7 or 8 years ago. We had 2
> problems, dripping and some difficulty re-priming after a strainer change.
>
> The new seals were fairly easy to reinstall as I recall and solved the
> leaking problem but not the priming.  That turned out to be wear on the
> back
> plate and also on the opposite face of the pump body.  So, if you find that
> you ever start having priming problems and the impeller is in good shape,
> just consider a new pump.
>
> We did this and it pump water *so* much more forceful than the old pump and
> instantly primes every time.  Was a great maintenance investment since I
> believe it will be able to keep the engine cooler longer as the filter
> becomes more restricted.  People who sail in water that has a lot of fine
> sand or silt (or run aground in sand and stir up a lot of sediment trying
> to
> back out) may be more likely experience early seal and pump body wear
> failures.
>
> -Jeff Hare
> #809
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
> Of Jbrown5093
> Sent: Thursday, July 21, 2016 3:52 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Fwd: Impeller housing leak.
>
> Great information!  Thanks
>
> Jim Brown
>
> Sent from my iPhone
>
> > On Jul 21, 2016, at 2:45 PM, Greg Flanagan <greg.flanagan at shaw.ca>
> wrote:
> >
> > Thanks to all for your ideas. Here is the latest word on solving the
> problem.
> >
> > I was informed that the hole in the housing is there for a reason and not
> a failure. If it drips it is a warning that something more serious is
> happening, or going to happen like bearing burnout.
> >
> > I removed the water pump (easy to do) and took it to the local service
> company. They checked it out and found the seals were failing. The bearings
> were ok. So with new seals  in place i will reinstall it this afternoon. It
> also required a new impeller and a new belt, both worn past their best
> before date. Some advice was to not have the belt too tight as this will
> stress the bearing and other parts. Note the boat is 10 years old so the
> pump has provided pretty good service as this is the first time it has
> shown
> any problems. It is very expensive (at least here in BC) to replace this
> (Johnson) pump from Yanmar.
> >
> > Thanks,
> >
> > Greg Flanagan
> > Sidney, BC
> > Hoop Dancer #1076
> >
> >> On Jul 14, 2016, at 3:02 PM, Ken Geiger <kendgb at aol.com> wrote:
> >>
> >> I do not know what the pump housing material is off hand, but one might
> apply a magnet to it to determine if it is magnetic.  If not then one might
> scrape back some paint and observe the colour of the material.  bronze is
> yellow/gold and aluminum is silverish.  If Magnetic then Iron alloy.
> >>
> >> After a thorough cleaning, best done by bead blasting, one might attempt
> having the hole fixed.
> >>
> >> If the housing is bronze one might braze repair the hole or silver braze
> (solder) it.  If Aluminium it could be welded up.  If cast iron then
> brazing.  One might also try an epoxy repair with the likes of JB Weld.
> >>
> >> Of course for the brazing and welding you need the equipment, supplies
> and know how.
> >>
> >> Then when you do get a new pump,  this patched one becomes a good back
> up.
> >>
> >> FWIW
> >>
> >> Ken
> >>
> >> Northern Dream  #765
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> ---- Original Message ----
> >> From: Greg Flanagan <greg.flanagan at shaw.ca>
> >> To: C320-List <C320-List at Catalina320.com>
> >> Sent: Thu, Jul 14, 2016 5:46 pm
> >> Subject: Re: [C320-list] Fwd:  Impeller housing leak.
> >>
> >> I don't know the composition of the metal. The leak is in the impeller
> housing inlet hose pipe I called the bib. It appears as a pinhole with rust
> around it (and salt) and drips water which then flows down the impeller
> outlet hose at the bottom and drips on the floor. Not a great flow but adds
> up with time running the engine and flows over the galley floor.
> >>
> >> Thanks,
> >>
> >> Greg Flanagan
> >> 10460 Allbay Road
> >> Sidney, BC V8L 2P3
> >> 250 665-7245
> >>
> >>> On Jul 14, 2016, at 2:39 PM, millers1 at aol.com wrote:
> >>>
> >>>
> >>> Greg,   Is the leak in the cast bronze housing?  Does it manifest
> itself
> as a weep/leak like a pin hole;e or porosity
> >>> in the casting??
> >>>
> >>>
> >>> Several companies put out products to deal with casting porosity
> problems.    One I remember is Loc-tite.
> >>> You need to get the kit with the base material being bronze.
> >>>
> >>>
> >>> Art   #680
> >>>
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: Jeff Hare <Catalina at thehares.com>
> >>> To: C320-List <C320-List at Catalina320.com>
> >>> Sent: Thu, Jul 14, 2016 3:38 pm
> >>> Subject: Re: [C320-list] Impeller housing leak.
> >>>
> >>> Worth shopping around for.  We got a new water pump (3GM) through
> >>> Merri-Mar Yacht Basin in Newburyport, MA for $280.  Others on this
> >>> list (not local) have purchased one through him and had it shipped.
> >>>
> >>> So, the prices may vary a lot, so worth looking around.
> >>>
> >>> -Jeff
> >>>
> >>> -----Original Message-----
> >>> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> >>> Behalf Of Greg Flanagan
> >>> Sent: Thursday, July 14, 2016 11:42 AM
> >>> To: C320-List at Catalina320.com
> >>> Subject: [C320-list] Impeller housing leak.
> >>>
> >>> RE: Yanmar 3YM30
> >>>
> >>> It appears I have a leak in the impeller housing inlet hose bib. It
> >>> appears a rust hole has developed. At first I thought it was a leak
> >>> in the lower outlet hose (with pressure release valve) which
> >>> connects with the outlet side of the impeller. However, I replaced this
> hose and the leak persisted.
> >>> Upon close inspection I think it is above the hose connection in the
> >>> metal and just runs down the hose.
> >>>
> >>> I tried to purchase a new impeller housing (it is a separate part)
> >>> but Yanmar does not sell it separately. This part is just one part
> >>> of the sea water-pump assembly and they want over $500 for it.
> >>>
> >>> The questions: is it possible for this part to rust to the point of
> leaking?
> >>> If so can this hole be welded or repaired in some way? Does anyone
> >>> know if this part can be purchased separately? Is there a source for
> >>> good used parts?
> >>>
> >>> Thanks,
> >>>
> >>> Greg Flanagan
> >>> Hoop Dancer #1076 (2006)
> >>> Sidney, BC V8L 2P3
> >>> 250 665-7245=
> >>
>
>