Depends on the condition of the engine...
Depends on the condition of the radiator...
Depends on the thermostat (condition and "rating")...
Should run (normal operation) at the "rating" of the thermostat - 160* (probably "too cold") / 180* / 195*.
You should buy an infrared temp "gun" at a parts store (or sears)... -- measure at the thermostat housing / neck leading to the radiator
IH gauges May read differently - age / wiring / po "issues"...
The 392 in my t/a's (180 degree robertshaw thermostat) temp gauge needle is at the left edge of the horizontal line in the temp gauge at normal operating temp ( approx 180*), but another gauge May read differently.
