[Public-List] Raw water system trouble (blockage, stuckage?)

[Jeffrey]

Elbow immediately after heat exchanger? I hear those are notorious for
carbon buildup.

Jeff Fongemie
#116 Seagrass

http://picasaweb.google.com/fongemie







On Sat, Apr 21, 2012 at 3:03 PM, Andy <oakumspinner at gmail.com> wrote:
> Howdy Folks,
>
> I am having some issues with my raw water system.  Water is not getting
> through to the exhaust. At first I figured the pump, replaced the impeller,
> that didn't work.
> So, next in line, heat exchanger. Took that apart, it was a bit gunked up,
> but not awful. Completely cleaned it and rei-nstalled with new gaskets,
> surely that was it. Nope, same problem.
> Checked the next hoses, the ones with vacuum breaker, no clogging there.
> Next I ran the engine with the pump just going from a bucket to a bucket to
> see if moves water. The pump seems to work fine. but when I hook the output
> back to the heat exchanger (I kept the intake in the bucket to be able to
> see if water was being moved) little or no water is pulled from the bucket.
> After that out of curiosity I decided to pull pump to heat exchanger hose
> off the exchanger and was greeted with a small blast of water to the face.
> Pressure buildup from somewhere.
> This is a diesel by the way, Yanmar 2 cylinder, fresh water cooled.
>
> Help!  Does anyone have any ideas?
>
> Thanks,
>              Andy Shaw
>              #477 'Savannah Rose'
>               St. Mary's River, MD
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-- 
Jeffrey Fongemie

 1335040073.0