YM1700 normal operating temp

[normde2001]

That's still too much coolant. Assuming you have not installed a waterpump, I would drain it and cut 50/50 again with water, which would give the proper 75/25 mixture. Also make sure the system is clean, (backflush), inside and out.

 

[reb]

[...temp of about 220...]

The conventional wisdom seems to be that that is a high temp. It is not for an automobile. I wonder what the operating temp is for Yanmars with thermostats? I'm still running 50-50 antifreeze with my 1500D with no problems.

 

[Yanmar_1700]

I have the Sunpro temp gauge setup on my 1700. I have not run anything on the PTO. I have been running it hard in the sun down here (80 to 85) with a 4' boxblade. It is real hard to get it over 170. I run 30/70 with water wetter. It could be my gauge is not calibrated properly. It has been over 200 on occasion. I had several leaks in the radiator and hoses, all fixed. I noticed when the cooling system is working right, I see little bubbles coming out of the overflow hose into the overflow bottle. At least right after I have refilled after the leaks were fixed. I have seen people claim on here that their 1700 has a water pump. Mine does not. I'll have to check the cap again. There was some controversy here on the pressure it opens at.

 

[mah]

I have a 1700B with a water pump.