200 degrees is not high. 250 degrees is not high. High is when you reach 165 to 180c, or between 329 to 356 degrees f. At those temps the engine is indeed too hot. That's why temp guns are next to useless. You cannot obtain a useful or accurate engine temperature. If the engine is running below 200 f it's probably running much too cold. Most engines do not reach a useful and stable operating temp until they obtain a minimum of 80c, or 176 f. Below that point ands you cannot set an idle speed that will be the same when you land, or a correct mixture setting. Limiting the engine to 200 degrees provides an extremely limited operating temperature window (24 degrees f) that would be nearly impossible to achieve, especially after adding for ambient air temps prior to even starting the engine.