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.
-----Original Message----- From: David Risch [mailto:davidrisc...@msn.com] Sent: May-13-13 10:47 AM To: Don Jonsson ; cnc-list@cnc-list.com Subject: Re: Stus-List Overheating due to plugged knuckle 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
