[C320-list] Simple Hose Replace? - Between sea water pump and heat exchanger

[John Frost]

Dave

My 2007 Yanmar water pump is leaking. Distributor only has the "New and Improved" pump and says it is a direct replacement.
My parts manual says I have to upgrade the inlet hose from 17mm to 19mm. Was that your experience?

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-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Utility Comcast
Sent: Sunday, August 18, 2019 11:26 AM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Simple Hose Replace? - Between sea water pump and heat exchanger

I just replaced by “pre-bent” factory Yanmar hoses on the engine when I learned that I didn’t have to (leaky water pump that I replaced as well).  

I still have my old hoses for my 2007 3YM30 that are in excellent condition.  Our engine has 382 hours on it.

The factory replacement hoses, for just the three, cost over $200!  Crazy expensive.  If someone wants my three original hoses for much, much less + shipping, let me know.  They are cleaned and stored in the original Yanmar packaging that came with my too expensive replacement hoses.

Dave  

S/V Emily Ann
2007 C320 Mark II, No. 1107
Mukilteo, WA



 
David B. Swanson, P.E., S.E.
LEED AP/F. SEI
Structural Engineer
(425) 508-7971 mobile
kswanson123 at comcast.net



> On Aug 17, 2019, at 5:39 PM, sail-ability at sympatico.ca wrote:
> 
> You need to use the Yanmar hose with the manufactured bend in it. Straight hose won’t work. 
> JohnM
> 1999#574
> 
> Sent from my iPhone
> 
>> On Aug 17, 2019, at 11:43 AM, Doug Treff <doug at treff.us> wrote:
>> 
>> Joel,
>> 
>> I had the same issue a while back. I replaced the hose with the OEM part from Yanmar. Same thing. Mine was the factory original, painted to match the engine. In the end, in still had a leak. Turned out to be the water pump. I replaced it with a new pump and the leak stopped.
>> 
>> --
>> Doug Treff
>> doug at treff.us
>> 
>>> On Thu, Aug 15, 2019, at 6:17 AM, Joel Krauska wrote:
>>> Howdy.
>>> 
>>> I have a Yanmar 3GM30F.
>>> 
>>> I found a slow drip coming off the hose leading out of the sea water pump.
>>> 
>>> It looks to be coming from near the clamp on to the hose. I could 
>>> try to tighten up the clamp, but I think it's probably best to 
>>> replace also replace the hose.
>>> 
>>> I'm guessing that since this particular hose is still flaking silver 
>>> paint that it probably was factory.
>>> 
>>> I've replaced other hose runs with Shields 250 5/8" hose.
>>> 
>>> I'd like to do the same here but I was curious about the big 180 
>>> degree bend right before it enters the heat exchanger.  Will shields 
>>> 250 set and hold a bend like that?
>>> 
>>> Any other advice on doing this well?
>>> 
>>> Best,
>>> 
>>> Joel
>>> Catalina 320 - Grace #802
>>> South Beach, SF, CA.
>>>