How long to bake 8 lb fully cooked ham with brown sugar glaze on it?

Since the ham is fully cooked, you are essentially reheating it. To ensure food safety, the internal temperature of the ham should reach 140 degrees Fahrenheit. Preheat oven to 325 degrees Fahrenheit. Cover the ham with foil and place in oven. Bake for 20 minutes per pound, so for an 8 lb ham it would need 2 and 2/3 hours or 160 minutes to heat.