Danny — I’m not sure why they disconnected all of that; but given the high 
coolant temps, I would definitely replace all of the nylon-reinforced hose with 
high-temp rated hose.  I’ve seen the clear hose develop “aneurisms” when under 
high temp and pressure; these will burst and you’ll lose all your coolant.

Having said that, it’s nice to be able to see coolant flow, which the black 
high-temp hose doesn’t allow.  In doing a quick search, it appears that there 
is now silicone high-temp (500F) hose available.  This might be a nice option 
if you want to see the coolant flow.  I don’t have any personal experience with 
this hose.

— Fred

Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI   :^(

> On May 2, 2017, at 10:56 AM, Danny Haughey via CnC-List 
> <cnc-list@cnc-list.com> wrote:
> 
> Hello all,
> 
> Well, In the fall of 2015, when we were in the process of buying our boat, 
> the water heater was hooked up and tripping the shore power breaker at the 
> survey.  Surveyor said, it's probably just the element.
> 
> There is a loop in the engine for the piping to the coil heat exchanger 
> inside the water heater.  This was hooked at inspection.  Well, as i needed 
> some repairs done for the delivery home, I hired the yard where she spent 26 
> of her 30 years to fix a few things.  Drain the old fuel, replace filters, 
> replace some gauges, repair the toilet.  Well, after I got the boat home I 
> realized they had completely disconnected and bypassed the heat exchanger 
> tubing from the water heater to the engine and never said anything to me 
> about.
> 
> I called and called and called to try and find out why but, they simply 
> refused to return my call.
> 
> My question now is, should i just hook it back up and see what the issue is?
> 
> Here is a pic at survey.
> 
> https://1drv.ms/i/s!Al8x-ET7_b7Mn1uGbsxTIdKR5WX3 
> <https://1drv.ms/i/s!Al8x-ET7_b7Mn1uGbsxTIdKR5WX3>
> 
> You can see where nylon reinforced hose is attached.  Now, those two 
> connections are by passed.  I guess I could hook up a pump and pump water 
> through the heat exchanger and see if anything horrible happens that way.  
> Then, at least, i wouldn't get antifreeze all over the place.
> 
> Anyway, any insights, advice or observations will be great appreciated!
> 
> Danny
> Mattapoisett, Ma

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