[C320-list] Leaking impeller pump

[Jeff Hare]

This was quite a few years back and on a Yanmar 3gm30f EYU, so it's a Johnson Pump (F4B-903) in my case.  
If you buy the Johnson pump, there are a few distinct disadvantages.

1. It won't be painted gray
2. You won't receive the attractive plastic packaging with the nifty red Yanmar logo
3. You won't have the privilege of seeing the smile on your vendor's face when you hand him a couple extra Benjamins for no reason.

I know the bronze/black color scheme might offend some but it's something I've been able to live with.  😊

Fortunately, my Yanmar dealer sells the both the Johnson pump and the Yanmar Branded one and was honest about which one I should buy.  I think they were up to like $230 last I checked.

Cheers!
-Jeff Hare

PS: It's crazy how the price changes when you look at other engines.  The Yanmar 4j?? engine in a friend's boat couldn't get any pump for under $500 and it looked just about the same.

-----Original Message-----
From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of Bob Hoyt
Sent: Thursday, June 14, 2018 12:03 PM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Leaking impeller pump

Where did you buy the pump for $180? I know that the raw water pump for the Perkins M30 is $580. My recent rebuild was roughly $180

Bob Hoyt
Ikigai
1994 #58
Pensacola, FL

On Thu, Jun 14, 2018 at 10:57 AM, Jeff Hare <Catalina at thehares.com> wrote:

> As others have mentioned, a rebuild is in order.  But, you'll likely 
> also have wear/scoring of the back plate and the forward surface 
> inside the housing as well from grit in the water.  So the rebuild 
> will likely stop leaking if you replace the shaft and seal, but it 
> won't pump as much water as a new pump that doesn't have this wear.
>
> We purchased a new pump for $180 that primes instantly and pumps water 
> like a firehose compared to the old one (which I had installed the 
> pump rebuild kit). So, if you ever have any issues priming after 
> clearing the strainer, don't bother with a rebuild, get a new one for 
> just a few bucks more.
>
> My opinions of course...
> -Jeff Hare
> 2001 #809 Woodbine II
>
> -----Original Message-----
> From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of 
> Thomas Talling
> Sent: Wednesday, June 13, 2018 4:51 PM
> To: C320-List at Catalina320.com
> Subject: [C320-list] Leaking impeller pump
>
> Hi,
> I am having problems with my raw water pump leaking on my Yanmar diesel.
> I have replaced the impeller twice as well as the o ring and gasket 
> and the out going tubing and it is still dripping.  Is anyone aware of 
> a bearing or seal that the impeller shaft sets in that could be in 
> need or replacement and if so how difficult that would be?
>
> Tom Talling
> ttalling at gmail.com
> 215-262-1427
>
>


-- 

*Robert (Bob) Hoyt MD FACP*

*CAPT (Ret) USN*

*Diplomate, Clinical Informatics*

InformaticsEducation.org  <http://InformaticsEducation.org> rehoyt at gmail.com

Cell: 850-384-5235