Don,
Ever blow an impeller in years past?
David F. Risch
(401) 419-4650 cell
-----Original Message-----
From: Don Jonsson <[email protected]>
Date: Mon, 13 May 2013 17:44:51
To: <[email protected]>
Subject: Stus-List Overheating due to plugged knuckle
Hello all
I have an elderly Yanmar 3GMD engine that is raw water cooled. It has plugged
twice in the last two years where the water goes through a knuckle into the
mixing elbow. The first time (summer before last) was some solid bit that had
gotten stuck - how it got there I don't know. The last time (last week) was
due to a tar like substance gumming up the knuckle. Easy to clear and I was on
my way, but is this a harbinger of something more serious.
I took the mixing elbow off a few years back and cleaned it, guess it is time
to do that again.
Is the plugging coming from the exhaust and working its way into the knuckle -
for example unburned diesel?
Thanks for any insight.
Don
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