That's what it sounds like. It does not sound like a carbon build-up. However, if the engine is only used for short periods of time at low speed it might be contributing to the problem.
Joel 35/3 Annapolis On Mon, May 13, 2013 at 1:47 PM, David Risch <davidrisc...@msn.com> wrote: > Don, > > Ever blow an impeller in years past? > David F. Risch > (401) 419-4650 cell > > -----Original Message----- > From: Don Jonsson <dbjons...@shaw.ca> > Date: Mon, 13 May 2013 17:44:51 > To: <cnc-list@cnc-list.com> > 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 > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > -- Joel 301 541 8551
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