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  1. R

    ZD331 Overheating

    Just heated it up again and it was at 224 on upper radiator hose by the temperature sending unit.
  2. R

    ZD331 Overheating

    The last time I let it get hot to the point I needed to shut it down, I was short of the red on the temperature gauge, but heard the relief on the radiator. I shut it down and the coolant in the overflow was boiling....so I'd say well over 220.
  3. R

    ZD331 Overheating

    I've had issues with my ZD331 running hot. I can generally mow for up to an hour before it gets too hot for me to be comfortable. I have a 72" deck with a mulching kit. It doesn't matter if it is cool outside, there is still the same problem. I've changed the thermostat, pulled the radiator and...