Yanmar 135D operating temperature?

[normde2001]

If you back-flush you will know it's as good as it will get. You are only guessing now:confused3:. My YM2000B with factory electric gauge and tstat runs at about 155*. I have never owned a car, (10) that ever ran over 180* when everything was right

 

[gbart14]

It was back flushed about 10 running hours ago. Does your 2000B have a factory water pump? Where is your sending unit / probe located?

 

[normde2001]

It was back flushed about 10 running hours ago. Does your 2000B have a factory water pump? Where is your sending unit / probe located?

OOPS!!!! Meant to say waterpump instead of tstat. Sender is near the upper hose outlet. If flushed correctly and fins are clear, then you are as good as you can get, Assuming correct coolant mixture and no fan slippage.