[C320-list] Overheating alarm Yanmar 3ym30-2006-Hull #1089

[Moondancer5 at comcast.net]

Hi all,

Interesting that the issue is not isolated, I'll check the Google groups, thanks. Does anyone here regularly run this engine for any length of time @3000 and 'not' have an overheating issue?

Of course, the way we found out the replaced sender switch didn't help was entertaining. A very experienced friend guided me thru our first exit of Barnegat Inlet, lovely calm water, not much breeze, beautiful except for the view of a sailboat smashed up on the south jetty... sailed around outside a bit... coming back in, the breeze had kicked up, the current against us, and I was given a talk on how dangerous this 300 feet of inlet was, and how using full power to maintain course is important, and to give it full power now... and the overheating alarm went off on cue. I throttled down drastically, calmly handed the wheel to him to bring it in, barely making headway, and waited till we got back to the marina to go hide in the head and yell (with all gratitude to George Carlin): "F*#@ing meow!"

Susan



I have a 2004 C320 with the 3YM30.  I have been having over heating
issues this year where anything above 2400 RPM drives temperature above
180.  I understand 180 is the std operating temp.  I sail in cool
northern BC waters, so I get a very standard intake temp for cooling 

I have had mechanics go through entire cooling system  and no issues
were found. Only other symptom seems to be limited water  coming through
the exhaust system.  The exhaust system was also checked with no visible
issues.

I have done some searches on the topic in the forum  and there are a
couple of threads re this topic that seem  to have some suggestions
based on various symptoms that you may recognize. I found a couple that
I will use to check things out

Try Searching on at http://groups.google.com/group/c320-list

Overheating


Susan,

I have a Yanmar 3YM-30, year 2005.  The first year all was fine.  The
second 
year the engine overheated running at wide open throttle after 15
minutes. 
It usually runs a temp of 180 degrees, but overheats when it hits 220 
degrees.  I was told I did not have to change antifreeze every year 
initially, but Yanmar told me I have to change it yearly even if it is 
Dexcool.  Since I have changed the antifreeze it does not overheat as 
easily.


__
Kurt R. Budelmann, M.D.
Laurens County Medical Associates, P.A.