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

[John Boor]

Have you removed the heat exchanger output hose to see if water is passing
through.  If this is ok look at the exhaust elbow and feed hose.

John Boor

> Howdy Folks,
>
> I am having some issues with my raw water system.  Water is not getting
> through to the exhaust.
> 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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