Running a water-cooled engine (diesel or gasoline) at other than the designed temperature with the specified thermostat or thermostats is VERY bad for the engine and will shorten it's life in addition to causing reliability and other issues. The engineers did not add thermostats for their entertainment value.

Bill Bina


On 5/22/2014 12:53 AM, via CnC-List wrote:
I have the same engine in my LF38 which was converted to fwc by the previous 
owner. When I went to replace the thermostats I found there were none 
installed. The engine runs a 150 degrees at cruising speed with no stats, it 
does take a  while to reach it though.

Bill
---- Josh Muckley via CnC-List <cnc-list@cnc-list.com> wrote:
Why change?  Just let the engine run cooler.

Josh Muckley
1989 C&C 37+
S/V Sea Hawk
Solomons, MD
On May 21, 2014 2:07 PM, "PME via CnC-List" <cnc-list@cnc-list.com> wrote:

Hi,

I am converting Yanmar 3QM30 raw water cooling system into a fresh water
cooling system with a Sen-Dure heat exchanger.  The current thermostat is
Yanmar part number 105582-49200.    The fresh water thermostat listed for
the 3QM30F looks like a completely different size thermostat.    Does
anyone know the Yanmar part number for a fresh water (i.e. higher
temperature) thermostat which will fit a raw water 3QM30 system?

Thanks for any help.




-
Paul E.
1981 C&C Landfall 38
S/V Johanna Rose
Carrabelle, FL





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