[C320-list] Water pump weep hole

Larry Frank WindSwept at stx.rr.com
Mon Sep 21 18:50:57 PDT 2020


Dan,

No real secrets to the install.  You will need to remove two hose connections.  Before removing the hoses make sure your engine seacock is closed.  I removed the engine seawater strainer bowl to drain as much seawater out as possible, and did the same with the zinc in the heat exchanger.  I used a wet vac to collect as much seawater as possible.  Then remove 4 nuts from studs at the four corners of the pump and it should come right off.  Make sure you buy a new gasket that goes between the pump body and engine.  Clean off the old gasket, put the new gasket on, slide the pump on, put the washers and nuts on, tighten up and reinstall the hoses.  You will need to remove the hose fittings at the inlet and outlet of the old pump and install them in the new pump.  Since the pump shaft has two flats machined into the end to mate up with the engine, you should rotate the new pump shaft to the same orientation as the one you removed before putting it on the studs.  The most difficult part is that two of the four studs are difficult to access.  A well adjusted headlamp will help in the process.  Good luck!

Larry
WindSwept 
C320 #246

On 9/21/20, 8:00 PM, "C320-list on behalf of Dan" <c320-list-bounces at lists.catalina320.com on behalf of danb70341 at gmail.com> wrote:

    Thanks Larry I Will check out the JMP. Any hints on installing?
    Dan
    1995 #250
    Sent from my iPhone

    > On Sep 21, 2020, at 5:41 PM, Larry Frank <WindSwept at stx.rr.com>Will check out the JMP.  wrote:
    > 
    > Hi Dan,
    > 
    > I installed the JMP raw water pump on my Westerbeke 30B yesterday.  Fits perfectly and functions as expected.
    > 
    > Larry
    > WindSwept 
    > 1995 320 #246
    > 
    > 
    > On 9/18/20, 5:39 PM, "Larry Frank" <WindSwept at stx.rr.com> wrote:
    > 
    >    Dan,
    > 
    >    I am going through this right now.  A Westerbeke sourced pump or even rebuild kit including a shaft which should be replaced will be very expensive.  Best I found was a pump from JMP Pump (www.jmpusamarine.com).  Their model WB081P is an aftermarket version for the Westerbeke 30B and replaces Westerbeke part 48080.   I have this new pump on my workbench and planned on installing it on WindSwept this weekend however tropical Storm Beta is headed to the Gulf Coast of Texas where I live.  I don't think I want to get into an engine repair project and not be able to move the boat in an emergency situation if I run into a problem.  However it looks like exactly the same pump.  You can purchase the pump direct from JMP or there is a distributor Big Blue Ocean Marine in Florida.  Ryan at Big Blue is extremely helpful and he told me he would beat any price.  I found out about Big Blue because I called JMP and they referred me to Ryan as the expert.  My local mechanic found this pump for me so I purchased through him.  I paid him $404 for the pump and gasket, plus shipping and sales tax
    > 
    >    Larry
    >    WindSwept
    >    C320 #246.
    > 
    >    On 9/18/20, 4:07 PM, "C320-list on behalf of Dan" <c320-list-bounces at lists.catalina320.com on behalf of danb70341 at gmail.com> wrote:
    > 
    >        Thanks Jeff I thought that was the case so will have to check you tube on how to do it and the pump is expensive (westerbeke) so will see alternatives.
    > 
    >        Sent from my iPhone
    > 
    >> On Sep 18, 2020, at 3:07 PM, Jeff Hare <Catalina at thehares.com> wrote:
    >> 
    >> Nope.  Raw water pump leaking out the weep hole means seals are worn out.
    >> Most likely the body inside is also scored and the impeller faces aren't making a good seal.  Not the tips of the impeller but the front and back side surfaces of the impeller that rub against the back plate and the inside flat.Don't bother with the replacement seal kit.  It really isn't the answer.  Just get a new pump.  Don't know whether you have the Japanese yanmar or the westerbeke...If it's the antifreeze engine water pump, that doesn't have a rebuild kit that I'm aware of.Just but a new pump, spray the old one with wd40 and store it in a Ziploc bag if you feel you need a backup spare.  Unlikely you'll ever use it though...CheersJeff Hare#809
    >> -------- Original message --------From: Dan <danb70341 at gmail.com> Date: 9/18/20  2:48 PM  (GMT-05:00) To: c320-list at lists.catalina320.com Subject: [C320-list] Water pump weep hole Is there any other reason for water dripping out of water pump weep hole other than faulty water pump?Dan BochniakTranquility #250 1995Sent from my iPhone
    > 
    > 




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