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

[Utility Email]

John,

I replaced the inlet hose along with the other former hoses around the engine, but I think that I just used the same size as was previously there, 5/8” diameter, I believe.  

Dave

David B. Swanson, P.E., S.E.
Principal, LEED AP, F. SEI
Executive Vice President

Reid Middleton, Inc.
Engineers | Planners | Surveyors

Mobile:  (425) 508-7971

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> On Oct 16, 2019, at 7:24 AM, John Frost <john at frostnet.net> wrote:
> 
> Dave
> 
> Did you have to change hos sizes for the INLET to the new water pump? The spec sheet says the new pump needs a 19mm hose instead of the 17mm hose that came on our boats
> 
>                                         +
> Happy Sailing!          /||\
> John                           / ||  \
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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.
>>>> 
> 
> 
>