Operating without a thermostat?

[etpm]

Last weekend I flushed the cooling system and filled it with new coolant. I noticed that coolant is flowing in the radiator as soon as the engine is started. And the temp gauge always shows the engine running cool. So I think the thermostat is missing or stuck open. The tractor seems to run perfectly but since this is my first diesel engine powered anything I don't know if running cool could be damaging anything. I would rather not try to replace the thermostat if I don't need to. If I do does anybody know which thermostat it takes? Or if it is a common one that I can just take to the auto parts store and have them match it? I know I can buy one from Hoye or Fredricks but their prices and shipping charges are ridiculous. Hoye wants 40 bucks for a thermostat and Fredricks wants 23 bucks. Those prices seem high. Hoye wants 17 bucks shipping as does Fredricks.
Thanks,
Eric

 

[winston1]

Amazon.com

 

[careyo63]

Yanmar 2310 are comon. Org. # 129350-49800 Thermostat.

Thermostat 129350-49800 for Yanmar YM2002 YM140 YM146 YM1802 YM2620 YM2010 YM2310

Thermostat 129350-49800 for Yanmar YM2002 YM140 YM146 YM1802 YM2620 YM2010 YM2310

www.fridayparts.com

Free Shipping Cheap!
Still have that PTO.Shaft LOL...... Still can't Weld!!

 

[California]

Yanmar used a lot of third-party common stuff like thermostat, alternator, oil pressure sender etc that also appeared on Datsun (Nissan) in the same era. So a generic thermostat for an 80's Japanese car at the same rated opening temperature should be fine. rScotty, is this ok?

I'll also note my YM240 (YM2000), designed a few years earlier than YM2310, doesn't have a thermostat (or temperature gauge). Only a boilover warning light. Simple, and sufficient.

 

[careyo63]

I tried NAPA and nothing!

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[etpm]

Amazon.com

Thank You, I'm gonna order one.
Eric

 

[etpm]

Thanks for all the quick replies folks! I love TBN!
Eric

 

[ruffdog]

A diesel runs best the sooner it can get to full operating temperature. A car/truck with a stuck open thermostat will have horrible fuel mileage in a cool climate.

 

[etpm]

A diesel runs best the sooner it can get to full operating temperature. A car/truck with a stuck open thermostat will have horrible fuel mileage in a cool climate.

Thanks for the reply. It seems like it would be a very good idea to have a working thermostat. I'm ordering one tonight.
Eric

 

[ROUSTABOUT]

It needs a thermostat.