Yanmar rear end question

[william beveridge]

Mates, 

In re-commissioning this spring I noticed a small clear hose coming out of the bottom of the heat exchanger port.  The hose was hanging and had melted at the end.  I found no likely attaching point.  The Yanmar photos I found on an enthusiasts site show the location to have a pet-cock attached to it, not a tube/hose.  There is no water in the hose.  Anyone have an idea where this would attach and what if anything I need to do with it? below is a drawing from the Yanmar service manual for the engine, and the photo I attached is my actual engine showing the hose hanging there.   

Bill Beveridge

Perfectly Imperfect #355

Middle River, Maryland

[bill pittore]

Hi Bill,

 That hose is for draining the raw water out of the heat exchanger. The other end doesn’t connect anywhere.  I just put a container under it then loosen the little fitting that the hose connects to at the exchanger and the water drains.

Bill

<Yanmar hose.png>

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<PXL_20260425_175305009.jpg><Yanmar hose.png>

[william beveridge]

Bill - that makes sense. Hose is likely cheaper than the valve I saw, and the hose is directable.  Thank you. 

Bill

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