Stus-List Overheating due to plugged knuckle
dbjonsson at shaw.ca
Mon May 13 13:52:03 EDT 2013
Once, many years ago. I checked it when it overheated two years ago and it
was fine - i.e. the bit didn't come off of it. I didn't check it this time,
as when I cleared the knuckle the water was pumping fine and I was running
late in catching the ebb home.
From: David Risch [mailto:davidrisch75 at msn.com]
Sent: May-13-13 10:47 AM
To: Don Jonsson ; cnc-list at cnc-list.com
Subject: Re: Stus-List Overheating due to plugged knuckle
Ever blow an impeller in years past?
David F. Risch
(401) 419-4650 cell
From: Don Jonsson <dbjonsson at shaw.ca>
Date: Mon, 13 May 2013 17:44:51
To: <cnc-list at cnc-list.com>
Subject: Stus-List Overheating due to plugged knuckle
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
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.
More information about the CnC-List