Is it a new servo?
Take the servo out of the car get a protractor and measure it's full lock angle it should be 60* ish, if not it must be faulty or there is a setting in your handset that needs adjusting. There was a guy at our club who complained about the same thing as it turned out he had added another model to his Sanwa handset and it defaulted the EPA to 100% from 150%.
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