late to this post, but i will give my data anyway. i live in mesa arizona and it is hot here....after completely servicing my generator including taking the radiator out, boiling it, flush, new coolant, thermostat, oil, filters hoses etc i just took my coach out yesterday (late july) and ran the generator for about 3 hours straight. it was a cool summer day, only 106 and generator temp never got much above 180.
tom
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