Hunter 33 Yanmar 3YM30 Overheating redux

[Scott B]

still waiting

Waiting for a response from Yanmar now and wanted to keep this thread alive. I'll keep posting until this is resolved.I'd like to hear from anyone else that has had this problem.

 

[Scott B]

still nothing

over a week and no repsonse to my e-mail to Yanmar. I'll have to try a few polite phone calls.

 

[Scott B]

Yanmar 3YM30 overheating continued

Many of the threads I've found on the overheating. Some threads contain several owners that have had this problem. http://archives.sailboatowners.com/...5&id=304324&ptl=H33 Useful New Info&id=304324 http://archives.sailboatowners.com/...5145101845.73&id=335340&ptl=#2005153163357.31 http://archives.sailboatowners.com/...5254210851.56&id=354830&ptl=#2005256121053.18 http://archives.sailboatowners.com/...05276024252.5&id=360019&ptl=#2005289212348.81 http://archives.sailboatowners.com/...06237140111.0&id=418319&ptl=#2006238033928.23 http://archives.sailboatowners.com/...&ptl=Poor sea trial results????????&id=299078 http://archives.sailboatowners.com/...303891&ptl=Yanmar 3YM30 Overheating&id=303891 http://archives.sailboatowners.com/...Yanmar 3YM30 overheating/ Hunter 33&id=304556 http://archives.sailboatowners.com/...747.21&id=440887&ptl=Yanmar problem&id=440887 http://archives.sailboatowners.com/...127&ptl=losing engine revs in 3ym30&id=423127 http://archives.sailboatowners.com/...=297521&ptl=Shouldn't have panicked&id=297521 http://www.cruisersforum.com/forums/f54/my-new-3ym30-overheats-2027.html http://www.cruisersforum.com/forums/f54/yanmar-3ym30-4576.html http://www.cruisersforum.com/forums/f55/yanmar-overheating-4572.html http://www.freeboards.net/index.php?mforum=yanmarhelp&showtopic=214 C&C 110 http://www.bangthecorner.com/forum/post/4732 Jeanneau SO35 http://forums.torresen.com/sailing/viewtopic.php?t=1693


Edit;

Just as a follow-up and for the record, Yanmar came through and replaced my heat exchanger core under warranty in the spring of 2008 as well as another Hunter 33 in my area.

 

[Jeff10528]

Overheating

I read this entire file and while my experience has nothing to do with Hunter or Yanmar your experience has some parallels to mine.A few years ago I had a GMC Jimmy that started to show some strange engine temperaature fluctuations on the gage. The dealer replaced the thermostat and engine temp. sensor which worked for a week or two followed by the same pattern of symptoms. Head scratching and "out of warranty" statements were made which got me really ------. Finally, they called the regional office after which I was told that GM had received some bad antifreeze from their OEM manufacturer. Time and pulling heavy loads, I was doing a lot of towing my glider around at the time, had resulted in the precipitation of solids from the antifreeze in the form of gunk which clogged up every part of the cooling system. They had the SUV for three days during which time they ran a caustic solution through the system, followed by a filtered fresh water rinse cycle. I was told that it took nine cycles to get all of the gunk out. After that, I never had another cooling problem. I can imagine that the widely distributed pattern of a few hundred engines a year spread over a dozen or so builders would make such a problem much harder to identify than in the automotive industry.Hang in there!